What Improvement with 059 Vortec heads? 305 TBI 1991
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Car: 1987 Firebird Formula
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What Improvement with 059 Vortec heads? 305 TBI 1991
I have a set of Vortec 059 heads, they need valve seals, and springs, but they're very clean. I'm considering putting them on my 305 TBI, aswell as a set of short Hedman headers. What kind of improvement would I see from stock?
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