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05-13-2010, 10:52 AM
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big block pro comp heads
just got heads back from machine shop. seats were good 1 peice swirl polished valves.valve to guide clearance good. spring pressure adv was 140 at 1.900 they were 105 @ 2.020 had to shim .090 to get 150lbs still have plenty of room for my .640 lift cam. and had thick deck also. getting close to putting everything together. these will be on 427 blown alky injected going in my bantam altered
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