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02-26-2007 06:47 AM #1
37 Ford build--IE: old Header issues thread /37 Ford/5.0/GT40P heads
Hey guys,
I'm new to this forum and have a question to run by you guys. I have a 37 Ford tudor with a '69 302, C4 auto, 9" rear. I'm currently rebuilding the engine with a few extras to up the performance. One addition is the GT40P heads from the 98-01 Explorer. With the different spark plug angle this creates issues with the headers. I need to use streetrod blockhugger headers to clear frame & steering but they will require modification on some of the tubes to clear the spark plugs. Many posts on Mustang sites I've read suggest dimpling the tube and various other methods for clearance. Wouldn't that restrict exhaust flow by dimpling a tube half shut for clearance? I don't know if the "P" headers by Mac will clear my steering & frame. Anybody have any experience with this on a fat fendered Ford? Thanks for your thoughts.
Welcome to CHR. I think that you need to hook up your vacuum advance. At part throttle when cruising you have less air and fuel in each cylinder, and the air-fuel mixture is not as densely packed...
MSD 8360 distributor vacuum advance