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Old 01-10-2017, 02:29 AM   #1
67 Burb
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Big Blocks In 67 - 72 C10/C20?

Were big blocks available in 67 - 72 Chevy C10 or C20 trucks? My 67 Suburban sales brochure shows no big blocks available for 67, but I have a sales brochure for 72 Chevy trucks that shows a "400" engine available that shows it has 402 C.I.
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Old 01-10-2017, 07:06 AM   #2
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Re: Big Blocks In 67 - 72 C10/C20?

Yes they were.....not sure all years but don't see why it. Friend bought 71/72 3/4 ton factory 402/th400, 60 rear posi a/c and it rotted out for being a New York truck.
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Old 01-10-2017, 07:48 AM   #3
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Re: Big Blocks In 67 - 72 C10/C20?

My Longhorn had a 402 BBC, my buddy had a 69 3/4 with a 396. Not sure about 'burbs.
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Old 01-10-2017, 01:03 PM   #4
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Re: Big Blocks In 67 - 72 C10/C20?

Yes. Not Terribly uncommon. Only in Two wheel drive. '67 is a bit of a one off - perhaps in 67 you couldn't? These were 396s at first and then they overbored it to 402 I think?
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Old 01-10-2017, 07:32 PM   #5
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Re: Big Blocks In 67 - 72 C10/C20?

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Originally Posted by TwoFiftyShifter View Post
Yes. Not Terribly uncommon. Only in Two wheel drive. '67 is a bit of a one off - perhaps in 67 you couldn't? These were 396s at first and then they overbored it to 402 I think?
In 1970 and 71 the engine was marketed as a 396, but were actually 402 C.I. as the bore was 0.032" larger than the 4.094" bore of the 396. Then in 72 they were called 402's. I don't know what GM was playing at there. I seem to recall back then that the story was that there was some problems with the early 402 engines, and GM called them 396 C.I. so buyers didn't know they were getting the 402 engine. But, who knows how stories get started?
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Old 01-10-2017, 07:42 PM   #6
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Re: Big Blocks In 67 - 72 C10/C20?

For whatever reason all Big Block trucks were badged as a "400" regardless if they had a 396 or a 402 in them.

Gary
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Old 01-10-2017, 11:51 PM   #7
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Re: Big Blocks In 67 - 72 C10/C20?

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For whatever reason all Big Block trucks were badged as a "400" regardless if they had a 396 or a 402 in them.

Gary
GM was on a 400 kick with the release of the 400 SBC. It saved money to make one set of 400 badges that they could use to represent several engine options. It was merely a cost-savings decision to call everything a 400.

I love going to car shows and hearing guys argue over whether their engine is a 396, 400 or 402.
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Old 01-11-2017, 12:25 AM   #8
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Re: Big Blocks In 67 - 72 C10/C20?

The big block was available starting in '68. In '68-'69 it would have been a 396 and '70-'72 would be a 402.
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Old 01-11-2017, 01:40 AM   #9
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Re: Big Blocks In 67 - 72 C10/C20?

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The big block was available starting in '68. In '68-'69 it would have been a 396 and '70-'72 would be a 402.
Thanks. That was what I was wanting to know.

Here's a scan from a '72 sales brochure showing the engine options.

Even though this is a GM Canada brochure, can I assume the selection was the same as in the US?
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Old 01-11-2017, 09:35 PM   #10
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Re: Big Blocks In 67 - 72 C10/C20?

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Originally Posted by storm9c1 View Post
I love going to car shows and hearing guys argue over whether their engine is a 396, 400 or 402.
I myself have laughed at a few arguments over the elusive 400 BBC!

Gary
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My 1972 GMC 1500 Super Custom (Creeping Death) "long term" build thread.

The Rebuild of Creeping Death after the wreck

Quote:
Originally Posted by LONGHAIR View Post
I would never rebuild a 305.
Quote:
Originally Posted by prostreetC-10 View Post
I love using vacuum gauges as part of the carb tuning process. I hook the gauge to the inside of my garbage can and leave it there.
Quote:
Originally Posted by Marv D View Post
Remember Murphys 2nd law of mechanical relationships... "OPPOSING COMPONENTS ATTEMPTING TO OCCUPY THE SAME SPACE, AT THE SAME TIME, GENERALLY END UP OCCUPYING ADJOINING SPACE AT THE BOTTOM OF THE OIL PAN"
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Old 01-16-2017, 07:03 PM   #11
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Re: Big Blocks In 67 - 72 C10/C20?

when did the 400 small block come out? Were they available on these trucks?
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Old 01-16-2017, 07:09 PM   #12
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Re: Big Blocks In 67 - 72 C10/C20?

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when did the 400 small block come out? Were they available on these trucks?

They came out in 1970, ended in 1980. IMO, best small block out there. They were available in cars and trucks. Cars I think went to the mid 70s if not earlier, but trucks up to '80. I should have bought it, 1980 1 ton Chevy 400, 4-speed, 205, 60 front, 14ff rear and 4.56s. It was like 20+years ago, bought thinking it was $500, needed some work...never saw it again....
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Old 01-16-2017, 07:18 PM   #13
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Re: Big Blocks In 67 - 72 C10/C20?

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Originally Posted by dave666693 View Post
when did the 400 small block come out? Were they available on these trucks?
I have no idea when the 400 small blocks were produced but they never were factory installed in a 67-72 light duty truck. Trucks had Small block 283, 307, 327, 350 and big block 396 and 402s.
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Old 01-16-2017, 07:23 PM   #14
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Re: Big Blocks In 67 - 72 C10/C20?

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Originally Posted by GASoline71 View Post
For whatever reason all Big Block trucks were badged as a "400" regardless if they had a 396 or a 402 in them.

Gary
They had 396 emblems in 69
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I currently own: 1940 Chevy Fire truck (project), 1946 Chevy truck (project), 1946 Chevy 1 Ton pick up, 1953 Chevy school bus (storage area), 1968 Chevy C10 (I have drove for 26 years), 1994 Chevy C2500 (daily driver), 2005 GMC crew cab K2500 (parts hauler) and more trucks for parts.
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Old 01-16-2017, 07:53 PM   #15
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Re: Big Blocks In 67 - 72 C10/C20?

Why were they not available in trucks when cars could get a 400 or even a 402?
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