OG, i dont think the margin is small. people are running unported "p"'s hitting high 12's. yeah you got to buy headers and that does suck. I may take the motor in my car now and put it in my tbird. i have 89 shortblock sitting in my garage that i may make a 306, with speed pro forged pitsons, Stage 2 Summit rods, and polish the stock crank and rebalance it with a girdle. Why do you ask?
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Cobra brakes are on! Finally.....
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