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 1959-1979 Big Pontiac Tech
 1979 455 Engine
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beertracker
Cochise

350 Posts

Posted - 02 Mar 2014 :  2:23:09 PM  Show Profile  Reply with Quote
I saw a 79 Pontiac 455 engine for sale. Sounds like it's a complete stock engine. Are there any years of manufacture I should avoid?

Since it's a 79 it will probably have beveled pistons & 124 cc heads? Those heads are worthless unless you are going for a turbo application.

I want a LS engine in my Pontiac

Edited by - beertracker on 02 Mar 2014 2:56:24 PM

Bill Boyle
Horse Feathers (Charter Member)

USA
4793 Posts

Posted - 02 Mar 2014 :  7:54:04 PM  Show Profile  Visit Bill Boyle's Homepage  Reply with Quote
There was no 455 in 1979 only the 400. Are you talking about a stroked 400? If you are it would be from and earlier year block casting as the '79 400s were left over from '78 or '77.

"Dedicated to keeping the classic Pontiac engine alive."

----
400 bored +.030, forged TRW pistons, ported 62 heads, Hedman headers, 2.5 SS dual exhaust X Pypes, Comp 276AH10 cam, Scorpion 1.65 RR, 850 Q-jet, stock intake & tuned HEI; original owner.
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GtoGuy32
Cochise

USA
842 Posts

Posted - 02 Mar 2014 :  9:35:50 PM  Show Profile  Reply with Quote
Can you get the block casting number and two digit engine code? Bill's right, no 455s in '79. Last year was 76 and those aren't worth building past 400 HP or so.
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cortcomp
Coyote

USA
5335 Posts

Posted - 02 Mar 2014 :  10:08:33 PM  Show Profile  Visit cortcomp's Homepage  Reply with Quote
what's different about the 455s in 76 vs earlier?
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GtoGuy32
Cochise

USA
842 Posts

Posted - 02 Mar 2014 :  11:45:15 PM  Show Profile  Reply with Quote
I thought most Pontiac V8s were "lightened" up after 75. I know they were doing this on 400s, I am not 100% sure on the 455s.

I'd defer this to someone like Jim Lehart to set the record straight.
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beertracker
Cochise

350 Posts

Posted - 03 Mar 2014 :  10:12:51 AM  Show Profile  Reply with Quote
quote:
Originally posted by Bill Boyle

There was no 455 in 1979 only the 400. Are you talking about a stroked 400? If you are it would be from and earlier year block casting as the '79 400s were left over from '78 or '77.



The Craig's List seller stated a 79 455 so that is where the year info came from therefore the seller is in-correct. As far as block codes the engine is 200 miles away. The point of my question was to determine is there were any 455 engines that should be avoided due to "casting lightening" as is true of 400s.

I want a LS engine in my Pontiac
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cortcomp
Coyote

USA
5335 Posts

Posted - 03 Mar 2014 :  11:03:51 AM  Show Profile  Visit cortcomp's Homepage  Reply with Quote
I think 76 was the last year for the 455. So instead of lightening it, they just ended it. I have not heard of any weakened 455 blocks, although that doesn't mean they don't exist, just that i don't know about them.
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Blued and Painted
Chief PONTIAC

USA
3404 Posts

Posted - 03 Mar 2014 :  11:17:10 AM  Show Profile  Reply with Quote
could it be a 79 Olds or Buick engine.


Bull Nose Formula/ 461/ Q-Jet/
TH400/ 3.08 8.5 / R44TS.
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bnorris_74
Crazy Horse

USA
1442 Posts

Posted - 06 Jul 2014 :  07:03:17 AM  Show Profile  Reply with Quote
TTT
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