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i'm building a ford 300ci and have looked high and low for a performance cylinder head. i'm starting to wonder if there's one out there. my block is bored 30 over and i have the offenhauser four barrel intake with headman headers. i just dont want to put the stock head back on!
Contact the guys at Clifford Research, they are the experts on Ford 6's. They can tell you what is available and/or what should be done to your head.
Clifford has some nice stuff.
We ran my dads old 300 six off of propane and built the engine up with 12.5:1 pistons, put on a header/free flowing exhaust, and amped the ignition.
With the slow burning-high octane propane and the long stroke of the 300 six that truck had great pulling power and got good mileage out of the propane.
Abe