View Single Post
Old 02-12-2018, 10:50 AM   #4
oldusafmsgt
Retired USAF
 
oldusafmsgt's Avatar
 
Join Date: May 2011
Location: Jasper, AL
Posts: 225
Re: 454 in a 63' GMC SWB

I've got a 60 and a 66 with big blocks. It is no more involved than swapping from a 6 cylinder to a small block. There is only a 100 pound difference in weight between an iron headed BBC and a small block V8, and an original 63 GMC V6 is only 40 pounds lighter than a BBC. There is no need to swap the front suspension cross member, (especially on a 63-66) and a TH400/475 will clear a low trans tunnel floor. 68-72 BBC motor mounts, or aftermarket mounts (CPP) is all you really need, along with the driveshaft shortened slightly. It's an easy, common swap that people have been doing since these trucks were new.
__________________
1960 Chevy Apache10 Short Fleetside
1961 Chevy Apache10 Short Fleetside
1961 Chevy Apache20 Fleetside
1963 Chevy C10 Short Fleetside
1965 Chevy C10 Short Stepside
1965 Chevy C10 Long Fleetside
1966 GMC 1000 Long Fleetside
1966 Chevy C10 Short Fleetside

Last edited by oldusafmsgt; 02-12-2018 at 11:00 AM.
oldusafmsgt is offline   Reply With Quote