I thank you...no I have not. Thank you for the link. I'll see what I get when I plug the numbers in. The builder is telling me CR should be just a touch over 10.5:1.
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1968 Firebird
IA2 522
340 E-heads
Northwind 950 Carb
4L80E
3.50:1 Rear
1969 Firebird
IA2 535
Northwind (Induction undetermined)
3.50:1 Rear
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