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vern650 · 07-23-2012, 04:30 PM

I'm quite positive the factory 8.1 had the longer stroke to get more torque, i thought i read it somewhere on a gm site. i'll see if i can find the info again just to be sure.

07-23-2012, 04:30 PM	#12
vern650 Registered User Join Date: Jul 2012 Location: hyrum utah Posts: 45	Re: 454 vs 496 vs 502 I'm quite positive the factory 8.1 had the longer stroke to get more torque, i thought i read it somewhere on a gm site. i'll see if i can find the info again just to be sure.