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Re: How much hp gain?
Dual plane preformer edlbrock intake with 600 cfm carb. 1.625in long tube headers with 2.5in dual exhaust hei ignition. I did compression test, 135psi on all cylinders. And yes it is tuned pretry good.
1.60 exhaust valve. Sorry.
on paper my compression should of went from 7.7 to 8.5.
It made a world of difference!
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