? for small block to big block swap - The 1947 - Present Chevrolet & GMC Truck Message Board Network

centsless · 02-24-2009, 05:47 PM

I pulled the 283 out of the "72, and installed a 454. It is in and bolted up using the small block mounts. Everything fits fine...except the headers. The right header clears everything fine, the left header is hitting the engine perch...BAD. I am not against denting the tube a little to introduce some clearance, but I would have to cut the front tube in half to get around this one. I have a '71 Suburban with the correct big block perches, but I don't want floor clearance issues with the TH400 trans, and also need the hood clearance for the blower. Anyone have any ideas or solutions for this dilemma?
Thanks!
Bob

02-24-2009, 05:47 PM	#1
centsless sufficiently talented fool Join Date: Jun 2006 Location: Forest Hill, MD Posts: 2,231	? for small block to big block swap I pulled the 283 out of the "72, and installed a 454. It is in and bolted up using the small block mounts. Everything fits fine...except the headers. The right header clears everything fine, the left header is hitting the engine perch...BAD. I am not against denting the tube a little to introduce some clearance, but I would have to cut the front tube in half to get around this one. I have a '71 Suburban with the correct big block perches, but I don't want floor clearance issues with the TH400 trans, and also need the hood clearance for the blower. Anyone have any ideas or solutions for this dilemma? Thanks! Bob __________________ "it's impossible to be surrounded by idiots when you are part of the circle" 2003 Suburban 2002 Pontiac Montana 1981 Corvette 1966 Impala Convertible Click here to support the board



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