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Old 02-05-2019, 12:12 AM   #1
Hollow65
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‘92 454 questions

1992 gmc 454 is it worth converting to a 496?
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Old 02-05-2019, 01:49 PM   #2
bob arrington
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Re: ‘92 454 questions

the way I understand it, its a 454 bored 60 over with a stroker crank and rods that can use pump gas. For the money spent on something to drive every day, not something I would do. depends on your intended use
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Old 02-05-2019, 02:11 PM   #3
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Re: ‘92 454 questions

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1992 gmc 454 is it worth converting to a 496?
what are you talking about? Is this a 454 equipped truck that you want to drop a 496 into, or do you have a 1992 454 that you want to rebuild into a 496?
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Old 02-05-2019, 02:19 PM   #4
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Re: ‘92 454 questions

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1992 gmc 454 is it worth converting to a 496?
hmmmm, "converting"
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Old 02-05-2019, 02:32 PM   #5
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Re: ‘92 454 questions

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what are you talking about? Is this a 454 equipped truck that you want to drop a 496 into, or do you have a 1992 454 that you want to rebuild into a 496?
Yes sir. Make in to a 496.
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Old 02-05-2019, 07:47 PM   #6
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Re: ‘92 454 questions

Seems everyone and their sister takes a sbc 350 and make it a 383. A 454 big block can be made a 496 by purchasing a scat rotating assembly either forged or cast depending how you plan on using it. Either bore block 030 for a 489 or go 060 for the 496 with the crankshaft having a longer stroke. You can use scat/eagle or others. I just mentioned scat because I have had success with forged rotating assemblies produced by scat
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Old 02-05-2019, 08:26 PM   #7
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Re: ‘92 454 questions

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Seems everyone and their sister takes a sbc 350 and make it a 383. A 454 big block can be made a 496 by purchasing a scat rotating assembly either forged or cast depending how you plan on using it. Either bore block 030 for a 489 or go 060 for the 496 with the crankshaft having a longer stroke. You can use scat/eagle or others. I just mentioned scat because I have had success with forged rotating assemblies produced by scat
Excellent suggestion on the 489. I plan to put my 8/71 on it and punish it. Thanks to all for the info. I know the block has 4 bolt mains so I’ll give it a shot.
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Old 02-05-2019, 09:21 PM   #8
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Re: ‘92 454 questions

That's most likely a Gen V block. They have specific requirements for head gaskets and no provision for a mechanical fuel pump. So, make sure you can get the head you want and it is compatible on a Gen V.

Make sure you aren't wanting to run a mechanical fuel pump as well. Personally, if I were building I would run a Mark IV 454 or find an L29 donor Vortec 7.4l.
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Old 02-05-2019, 09:32 PM   #9
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Re: ‘92 454 questions

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That's most likely a Gen V block. They have specific requirements for head gaskets and no provision for a mechanical fuel pump. So, make sure you can get the head you want and it is compatible on a Gen V.

Make sure you aren't wanting to run a mechanical fuel pump as well. Personally, if I were building I would run a Mark IV 454 or find an L29 donor Vortec 7.4l.
Dual electric pumps, the heads I’ll get worked. Thanks for the input. The motor is currently in my 92, I plan to use the block and the trans in my 65c10
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Old 02-06-2019, 01:33 PM   #10
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Re: ‘92 454 questions

The heads are peanut port. Good for low end torque and nothing else. The intake runner is just to small.
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Old 02-08-2019, 09:12 PM   #11
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Re: ‘92 454 questions

Peanut port heads still outflow most cheap aftermarket small block heads. They can be made to make decent power without much TOO much work.

Google "ported peanut port heads" and you will find enough to read for a week.

But I'd start with an L29 which has the hydraulic roller and a pretty darn good set of large oval port heads. You should be able to score one for fairly cheap in a pull-ur-parts type yard.
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