You should be able to run 11.80's to 11.90's falling out of a tree with a JUNK YARD 350 and a decent solid lifter cam. A 400 plus C.I. and your heads better run low 11.00's to 10.80's. A 150 shot better put the car in the 9's. If not I would be embarrassed and sell every thing
ops: . Suggestion on headers, small blocks will like a 1 x 3/4 dia primary tube
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