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08-11-2017, 02:04 PM
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#1 |
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Registered User
Join Date: Aug 2014
Location: Stone Mills, ON
Posts: 48
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1970 C10 SB 350 to BB 396 Swap
Bought a '67 396 BB for my C10, is it necessary to change my front springs? What other possible hurdles do I face?
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08-11-2017, 02:19 PM
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#2 | ||
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Registered User
Join Date: Aug 2016
Location: Lake Forest, CA
Posts: 2,177
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Re: 1970 C10 SB 350 to BB 396 Swap
Quote:
Quote:
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"Work hard, use your vacation days." 1970 C15 GMC Long Bed 1986 C20 Scottsdale 1983 K2500 Sierra Classic Suburban 6.2 Instagram: C10sofOC |
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08-11-2017, 04:28 PM
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#3 |
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Registered User
Join Date: Aug 2014
Location: Stone Mills, ON
Posts: 48
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Re: 1970 C10 SB 350 to BB 396 Swap
Was also thinking of swapping my TH350 for a Richmond T-10 4 speed. Anybody else try this before? Will that tranny hold up to the 396 that will be installed?
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08-11-2017, 06:00 PM
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#4 |
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Florida Edition
 
Join Date: Oct 2010
Location: Fruitland Park, FL
Posts: 4,008
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Re: 1970 C10 SB 350 to BB 396 Swap
Factory 1/2 ton big blocks came with stock 3/4 ton front springs to carry the extra weight. I used new stock 3/4 springs and cut 1/2 of a coil off to get the height I wanted (along with 2 1/2" drop spindles) and still retain the strength.
You'll also need a 4 row radiator as been mentioned and if you haven't upgraded your front brakes to disk I would do that too. Engine stands are different also.
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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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08-11-2017, 07:37 PM
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#5 |
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laying low
 
Join Date: Mar 2001
Location: Searcy, Ark. USA
Posts: 12,947
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Re: 1970 C10 SB 350 to BB 396 Swap
I imagine you will need all different accessory brackets too. Power steering pump with remote reservoir.
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Boog 69 Chevy stepside, 358/T350, 4.11 posi, 4.5/4 drop, rallys, poboy driver primer is finer 91 Chevy sportside, Tahoe, Yukon & GMC Crewcab All GM..'nuff said. I stand for the flag and kneel at the cross |
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08-12-2017, 02:08 PM
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#6 |
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Senior Member
Join Date: Jun 2005
Location: Winona Lake, IN
Posts: 6,208
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Re: 1970 C10 SB 350 to BB 396 Swap
You do not need to replace the front coils. My '70 had a 250 in it and I put in a 402 and did not change the springs. The ride height is the same as before. You will need engine stands as mentioned but the 350 mounts will work and are much less expensive than the big block mounts. I had to move the automatic transmission crossmember back to the rear mounting holes and shorten the driveshaft but you should not need to do that. Also you do not need a 4-core radiator unless you have air or will be towing with it. I have a 3-core and it keeps it plenty cool. The engine is stock with a mild cam and an Edelbrock 750 carb with HEI. You will need a big block fan shroud however.
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70 C/10 SWB 402/TH400/3.73 "The Needy Beast" 200,000 Mile Club Disc Brake Club Owner installed options: Front Sway Bar Power Steering Power Brakes Cigar Lighter Courtesy Lights Deluxe Side Markers Wiper Delay Power windows Power Locks Coming soon: EFI 2015 Silverado 1500 LS 4.3/6L80/3.23 |
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