The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Any issues with swapping from 396 to 454 HO in 67-72 Trucks?

Doug's68SS · 01-14-2016, 01:59 PM

I saw a couple of post about the flex plate but you will need a Balancer also. the 396/402 are internally balanced and the 454 is external. the 454 Flex Plate has weights on it and the balancer has weight on it also.

01-14-2016, 01:59 PM	#16
Doug's68SS Registered User Join Date: May 2009 Location: Canton, Tx Posts: 175	Re: Any issues with swapping from 396 to 454 HO in 67-72 Trucks? I saw a couple of post about the flex plate but you will need a Balancer also. the 396/402 are internally balanced and the 454 is external. the 454 Flex Plate has weights on it and the balancer has weight on it also.