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02-15-2005 02:28 PM #1
heads
I have a set of 454 heads. Larg oval port 1974 or so. two different heads. Casting # 336781 and #353049. There from 110 cc to 119 cc. For one. What are these heads? I have a 454 with small over port head on the right now 110 cc with 8.2 to 1 compersion ratio. I would like to see close to 9.0 to 1. Can I take enough stock of these heads to get this?
Thanks
Dan
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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