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The heads are great! I recommend the 72cc heads. I don't think you will have a problem with compression ratio. I would use new Edelbrock studs for your rocker shafts instead of bolts because helicoils are known to fail with repeated tightening with bolts.
These are medium riser heads so use medium riser manifold. Dual 600cfm carbs may be too much for normal street driving. I switched to dual 450's with mechanical secondaries and found they are crisper w/o the vacuum sec. and better on gas mileage.
Paul
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