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04-04-2019, 01:04 PM
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#1 |
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Registered User
Join Date: Nov 2011
Location: USA
Posts: 375
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How to tell if original 1968 C10 bigblock 396 truck?
I have purchased a 1968 Chevy C10 shortbed. On the SPID it lists the 396 bigblock engine with 400 turbo transmission.
Are there some other things to look for to verify that the truck did come with a 396 bigblock? |
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04-04-2019, 01:29 PM
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#2 | |
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Registered User
Join Date: Dec 2017
Location: Elkhart, Texas
Posts: 1,532
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Re: How to tell if original 1968 C10 bigblock 396 truck?
Quote:
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04-04-2019, 01:31 PM
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#3 |
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Senior Member
 
Join Date: Feb 2009
Location: Northern Nevada
Posts: 7,120
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Re: How to tell if original 1968 C10 bigblock 396 truck?
The block has a part number and date stamp located near the transmission housing. You can even search the part number to see what years it was installed in. The date stamp should be approx. 1 month before the truck was built.
The truck may still have a build sheet too. They're generally located underneath or behind the seat.
__________________
Tony 71 Custom Deluxe, SWB, 2WD, 402, A/C. I developed an assm. guide "kit" for restoring it from ground up. With assys, the guide accts for 1000s of OEM identifications and part numbers, all written in short order. 700+ images include assm, illust., charts, and points of interest. Much of the info. applies to all 67-72 GM trucks, and to a lessor degree all 67-72 GM vehicles. My build thread, and more on the guide https://67-72chevytrucks.com/vboard/...d.php?t=730025 |
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04-04-2019, 03:11 PM
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#4 |
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Florida Edition
 
Join Date: Oct 2010
Location: Fruitland Park, FL
Posts: 4,010
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Re: How to tell if original 1968 C10 bigblock 396 truck?
On my 70 = Bolt in trans hump cover, remote PS reservoir, 4 row radiator, duel exhaust, heat shield under passenger floor, BB motor mounts.
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70 GMC Short Stepside "Rose"-An American Beauty: Factory 402/TH400, AM/FM, AC, Tilt, Tach, Buckets, Posi, PS, PB, 3-5 Drop, Complete Resto-Rod 67 C-20 Slant Back Wrecker "Mad Max" 67 C-10 Ratrod "Step-N-Wolf" 71 Serro Scotty Sportsman camper "Scotty" 97 LT1 Z28 "The Hornet" Link to more pics of "Rose" http://67-72chevytrucks.com/vboard/a...p?albumid=1684 Check out my "Cheap Tricks" thread and add to it if you can, lots of good info there. http://67-72chevytrucks.com/vboard/s...d.php?t=489394 |
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04-04-2019, 03:46 PM
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#5 |
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Registered User
Join Date: Sep 2011
Location: Ark City, Kansas
Posts: 3,280
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Re: How to tell if original 1968 C10 bigblock 396 truck?
The frame is narrower in the area of the exhaust manifolds are, for clearance...the edges should look like the factory made it that way...although someone could do that and make it look factory also....I guess...
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04-04-2019, 06:25 PM
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#6 |
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Registered User
Join Date: Dec 1999
Location: Austin, TX, USA
Posts: 7,709
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Re: How to tell if original 1968 C10 bigblock 396 truck?
Open hood. Check for big block?
In all seriousness is there a motor? Short pump? Motor mount stands with the large hole in the center.
__________________
44 Willys MB 52 M38A1 64 Corvette Coupe 68 Camaro 'vert LT1 & TH700 69 Z/28 355 12.6's @110 69 Chevy Short Step 4 1/2"/7" drop 72 Jimmy 4WD 4spd 4" & 35's 02 GMC 2500HD 4x4 Duramax |
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04-04-2019, 06:55 PM
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#7 | |
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Senior Member
Join Date: Feb 2009
Location: Northern Nevada
Posts: 7,120
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Re: How to tell if original 1968 C10 bigblock 396 truck?
Quote:
__________________
Tony 71 Custom Deluxe, SWB, 2WD, 402, A/C. I developed an assm. guide "kit" for restoring it from ground up. With assys, the guide accts for 1000s of OEM identifications and part numbers, all written in short order. 700+ images include assm, illust., charts, and points of interest. Much of the info. applies to all 67-72 GM trucks, and to a lessor degree all 67-72 GM vehicles. My build thread, and more on the guide https://67-72chevytrucks.com/vboard/...d.php?t=730025 |
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04-04-2019, 07:22 PM
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#8 | |
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Registered User
Join Date: Aug 2012
Location: St. Croix River Valley, WI
Posts: 795
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Re: How to tell if original 1968 C10 bigblock 396 truck?
Quote:
Nice score.....Let's see some pics!
__________________
Meet "Old Roy": http://67-72chevytrucks.com/vboard/s...d.php?t=707801 |
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04-04-2019, 07:52 PM
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#9 | |
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Senior Member
Join Date: Feb 2009
Location: Northern Nevada
Posts: 7,120
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Re: How to tell if original 1968 C10 bigblock 396 truck?
Quote:
Less probably the HP heads, you drive a 68 SS truck 
__________________
Tony 71 Custom Deluxe, SWB, 2WD, 402, A/C. I developed an assm. guide "kit" for restoring it from ground up. With assys, the guide accts for 1000s of OEM identifications and part numbers, all written in short order. 700+ images include assm, illust., charts, and points of interest. Much of the info. applies to all 67-72 GM trucks, and to a lessor degree all 67-72 GM vehicles. My build thread, and more on the guide https://67-72chevytrucks.com/vboard/...d.php?t=730025 |
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04-04-2019, 08:56 PM
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#10 | |
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BlahBlahBlah
Join Date: Feb 2002
Location: Monroe, Wa.
Posts: 19,782
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Re: How to tell if original 1968 C10 bigblock 396 truck?
Quote:
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04-04-2019, 10:17 PM
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#11 |
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Registered User
Join Date: Dec 1999
Location: Austin, TX, USA
Posts: 7,709
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Re: How to tell if original 1968 C10 bigblock 396 truck?
On the first big block trucks they did cut the frame back. On 69-72 frames the edge is bent up for clearance. Not sure at what point they switched over on that? One of the challenges of 67-68 big block swaps. That and the clearance for the power steering box.
__________________
44 Willys MB 52 M38A1 64 Corvette Coupe 68 Camaro 'vert LT1 & TH700 69 Z/28 355 12.6's @110 69 Chevy Short Step 4 1/2"/7" drop 72 Jimmy 4WD 4spd 4" & 35's 02 GMC 2500HD 4x4 Duramax |
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04-04-2019, 10:30 PM
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#12 |
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Senior Member
Join Date: Jan 2007
Location: Turlock, CA
Posts: 8,345
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Re: How to tell if original 1968 C10 bigblock 396 truck?
I think it’s all been covered. Mine has thinner frame sections up front, but I’m not 100% positive these corner edges are the difference? I only have a sbc c30 to compare to and it doesn’t have these...
How about some pictures???
__________________
I live in California, but identify as a Texan  "If a job's worth doing, it's worth doing well" Project "Little Sister" (70 c10 blue original paint refresh) Project "C10 Fever" (68 factory black 396 swb) Project "Blue Bomb" (70 c30 blue original paint refresh) Project "Vitamin C" (71 c10 orange original paint refresh) |
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04-05-2019, 12:23 AM
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#13 | |
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Senior Member
Join Date: Feb 2009
Location: Northern Nevada
Posts: 7,120
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Re: How to tell if original 1968 C10 bigblock 396 truck?
Quote:
__________________
Tony 71 Custom Deluxe, SWB, 2WD, 402, A/C. I developed an assm. guide "kit" for restoring it from ground up. With assys, the guide accts for 1000s of OEM identifications and part numbers, all written in short order. 700+ images include assm, illust., charts, and points of interest. Much of the info. applies to all 67-72 GM trucks, and to a lessor degree all 67-72 GM vehicles. My build thread, and more on the guide https://67-72chevytrucks.com/vboard/...d.php?t=730025 Last edited by 71CHEVYSHORTBED402; 04-05-2019 at 12:29 AM. |
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04-05-2019, 01:04 AM
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#14 |
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BlahBlahBlah
Join Date: Feb 2002
Location: Monroe, Wa.
Posts: 19,782
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Re: How to tell if original 1968 C10 bigblock 396 truck?
Crazy ... Never seen it before. Might be because I hadn't had a big block truck that was stock before. Love to see more about this.
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04-05-2019, 11:49 AM
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#15 | |
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Who Changed This?
Join Date: Jan 2013
Location: Simi Valley, CA
Posts: 10,091
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Re: How to tell if original 1968 C10 bigblock 396 truck?
Quote:
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~Steven '70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper Simi Valley, CA |
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04-05-2019, 02:08 PM
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#16 |
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Registered User
Join Date: Aug 2004
Location: Oakville, MO
Posts: 1,018
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Re: How to tell if original 1968 C10 bigblock 396 truck?
Also do you have the original protecto plate? If so the engine, transmission, and differential codes are on the plate (stamped into the steel by GM)as well as the vin so you can confirm its the correct plate for the truck. If then you cant identify the engine code that is on the protecto plate there are listings and people here on the forum that can look up your findings
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04-05-2019, 02:33 PM
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#17 | |
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Registered User
Join Date: Sep 2011
Location: Ark City, Kansas
Posts: 3,280
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Re: How to tell if original 1968 C10 bigblock 396 truck?
Quote:
I have owned my 68 Golden LWB 396 pickup since 1980. I will be making measurements one day to compare to small block and 6 banger pickups, and post here...maybe this summer. I learned this here!!! In the build section, there's a thread, 67 Plane Jane 396 build, on posts 52 and 53 he is cutting his frame for clearance... My 68 is crammed in my garage, I am curious exactly how my frame is modified... Last edited by 68Gold/white; 04-05-2019 at 02:46 PM. |
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04-05-2019, 10:50 PM
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#18 |
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Guest
Posts: n/a
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Re: How to tell if original 1968 C10 bigblock 396 truck?
Post some pictures; we like pictures and without them, the truck does not exist.
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04-05-2019, 11:17 PM
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#19 |
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I have a radical idea!
Join Date: Jan 2005
Location: Sweet Home Alabama!
Posts: 6,513
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Re: How to tell if original 1968 C10 bigblock 396 truck?
I found out the need for the BBC clearance when I put the diesel in my ‘67 C-30 dually. I had seen a couple of them in later trucks, and the guys said they were a bolt in deal. After about the 3rd time of trying to shoe horn it my I realized the on my ‘67 was wider than all of the other trucks I had. I had 2 BBC trucks here and at that time, and I immediately saw the problem. I had to cut mine like the BBC’s and the diesel slipped right on in.
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'67 C-30 Dually Pickup 6.2 Turbo Diesel, NP435 ‘72 C-10 SWB , 350 4bbl, TH350 '69 C-10 SWB , 250 L6, 3 OTT '69 GMC C3500, dump truck, 351 V6, NP435 '84 M1009 CUCV Military Blazer 67 C-30 Turbodiesel build thread http://67-72chevytrucks.com/vboard/s...d.php?t=254096 My trucks http://s226.photobucket.com/albums/d...ediafilter=all Member of the 1-Ton Club! Last edited by 67_C-30; 04-05-2019 at 11:23 PM. |
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04-06-2019, 12:30 PM
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#20 | |
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BlahBlahBlah
Join Date: Feb 2002
Location: Monroe, Wa.
Posts: 19,782
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Re: How to tell if original 1968 C10 bigblock 396 truck?
Quote:
__________________
… … … … … … … … ... … … … … … … … … … … … Monroe Swap meet May 18-19. Mike has the same spots for the NW guys he's had forever. Lunch time BBQ at the spaces. If you have stuff to sell bring it along. If you have a question PM stllookn (Mike) here via the board. https://67-72chevytrucks.com/vboard/...d.php?t=851291 |
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04-06-2019, 04:18 PM
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#21 |
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Scrapper 1
Join Date: Jan 2007
Location: Riverside Calif
Posts: 1,649
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Re: How to tell if original 1968 C10 bigblock 396 truck?
this was one Area I stayed away from when I was out buying trucks back in 1987--1996 It really did not matter if the truck came with a big block or not. My 1968 longhorn has a 396 in it with a th400 with AC. When I was buying car's for the AUS and Fin land they were only looking for certain car's No trucks. I'm a working man that's all I bought back in 1989--98. I love coming across them 1964--66 3 ton C60 Box trucks and Bobtails I bought 3 of them in 1 month for less than 300.00. I bought over 57 chevy trucks from 1989--2003 1950--72
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04-14-2019, 02:52 PM
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#22 |
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Registered User
Join Date: Nov 2011
Location: USA
Posts: 375
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Re: How to tell if original 1968 C10 bigblock 396 truck?
I finally got the truck home and will try to find out how to post pics tomorrow. There are two silver door tags located in the driver side door jamb and the VIN on that matches the SPID in the glove box and I did check for VIN stamped into the driver side of the frame in engine compartment and they match the last 8 digits of the VIN also. The numbers all match what is on the title so everything checks out. I can also verify that my frame rail is narrower near where the exhaust area of the truck is and it has a rather very big factory radiator. The trans floor hump in the interior also looks raised as well. All seems to check out that the truck is original black in color, red interior with four barrel 396 bigblock and Turbo 400 transmission.
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04-15-2019, 03:49 PM
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#23 |
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Registered User
Join Date: Sep 2011
Location: Ark City, Kansas
Posts: 3,280
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Re: How to tell if original 1968 C10 bigblock 396 truck?
I'm just bringing this one to the top, mostly because it's an original big block, which is not that common...(some thread here, months ago some guy was touting that big block pickups were pretty common. In the 68-72's, I've almost never seen any that were...)
AND was wondering, about what some of the posters, that were not completely believing about the narrow "big block" frame thought.... |
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04-16-2019, 06:08 PM
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#24 |
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Registered User
Join Date: Dec 2014
Location: Coal City, IL
Posts: 695
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Re: How to tell if original 1968 C10 bigblock 396 truck?
Maybe they all have this frame narrowing on later years. My 1970 250 has something like that.
__________________
Tony Nicholas @ Midwest Metal Masters 1953 Chevy 3100 392 Hemi w/727 & 9” Ford 1985 Chevy C/10 6.0L 4L80 373 locker |
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04-20-2019, 04:46 PM
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#25 |
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Registered User
Join Date: Sep 2011
Location: Ark City, Kansas
Posts: 3,280
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Re: How to tell if original 1968 C10 bigblock 396 truck?
Thanks 65, that's interesting...
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