Newer 454ís - Chevelle Tech
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post #1 of 19 (permalink) Old Jun 22nd, 19, 8:29 PM Thread Starter
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Newer 454ís

Iím not up to date on the Gen V and 6 454ís. I understand that they went to a roller cam and 1 piece rear main seal at some point. In what models and years could these be found?

Thanks

Devin

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post #2 of 19 (permalink) Old Jun 22nd, 19, 9:40 PM
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Re: Newer 454ís

Devin,
I am pretty sure 1991 was the first year of the new Big Blocks. Main difference is the one piece rear main seal crankshaft and different water passages in the heads.

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post #3 of 19 (permalink) Old Jun 23rd, 19, 6:57 AM
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post #4 of 19 (permalink) Old Jun 23rd, 19, 9:18 AM
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Re: Newer 454ís

I prefer the Gen 6, started in 1996. Priority main oiling, OEM hydraulic roller cam/lifters, less rear main seal leaks. I'm hoarding them, I snatch up every one I find at the right price.
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post #5 of 19 (permalink) Old Jun 23rd, 19, 7:10 PM Thread Starter
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Re: Newer 454ís

The Gen 6 is what I was thinking of. I did some more research and it looks like it was used from 1996-2000.

Thanks for the responses

Devin

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post #6 of 19 (permalink) Old Jun 23rd, 19, 9:09 PM
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Re: Newer 454ís

avoid the gen 5 like the plague. nothing really wrong with them its just things like the hole layout on the deck make cyl hed options limited
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post #7 of 19 (permalink) Old Jun 24th, 19, 9:43 AM
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Re: Newer 454ís

The Gen 5 blocks have no provision for a fuel pump and no place to mount the z bar in a clutch application. I was talking about them the other day with a guy and he said all they are good for is pumping water " well engine" I agreed completely. Too many issues to be worth messing with. Stick with gen 4 and gen 6 blocks.
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post #8 of 19 (permalink) Old Jun 24th, 19, 2:09 PM
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Re: Newer 454ís

Most Gen 6's don't have fuel pump provisions, either. Once in a while you see one that was a crate engine, those have it. Most of the production blocks don't.

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post #9 of 19 (permalink) Old Jun 29th, 19, 2:44 PM Thread Starter
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Re: Newer 454ís

So weíre looking at a Gen 6 454 that a former coworker has in his early 70ís K10. What is required to drop it into my sonís 65, other than the obvious headers? I know it will need a short water pump setup, what about the oil pan? Is the flexplate different with the 1 piece rear seal? Anything else?

Thanks,

Devin

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post #10 of 19 (permalink) Old Jun 29th, 19, 3:14 PM
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Re: Newer 454ís

Flexplate is different, changed the bolt pattern with the 1-piece rms.
Make sure you know if it does or doesn't have provision for fuel pump, get that handled before you drop it in.

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post #11 of 19 (permalink) Old Jun 29th, 19, 4:20 PM
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Re: Newer 454ís

Quote:
Originally Posted by Busted Knuckles View Post
Flexplate is different, changed the bolt pattern with the 1-piece rms.
Make sure you know if it does or doesn't have provision for fuel pump, get that handled before you drop it in.

BB bolt pattern is the same but the balance is different

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post #12 of 19 (permalink) Old Jun 29th, 19, 4:53 PM
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Re: Newer 454ís

Oops....at least I knew it was different LOL
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post #13 of 19 (permalink) Old Jun 29th, 19, 6:54 PM
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Re: Newer 454ís

Quote:
Originally Posted by 64SS427 View Post
So weíre looking at a Gen 6 454 that a former coworker has in his early 70ís K10. What is required to drop it into my sonís 65, other than the obvious headers? I know it will need a short water pump setup, what about the oil pan? Is the flexplate different with the 1 piece rear seal? Anything else?

Thanks,

Devin
If it's a GMPP crate engine (either 454 HO or ZZ454) I'd think twice about it. See run, drive it if you can. There were issues with the Mexican-built crate engines.

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post #14 of 19 (permalink) Old Aug 18th, 19, 12:28 AM Thread Starter
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Re: Newer 454ís

So it seems we're now in the posession of a Gen VI motor. Can anybody advise as to what oil pan will fit the A-body chassis?

Thanks,

Devin

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post #15 of 19 (permalink) Old Aug 18th, 19, 1:04 AM
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Re: Newer 454ís

Canton and Milodon offer street pans for the Gen5/6 big block. Call them first to confirm your chassis.

https://www.summitracing.com/parts/ctr-15-320t

https://www.summitracing.com/parts/mil-30955

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