OE IronHead LT1 is 10.5to1 compression.
If he uses the gasket that goes with the iron heads, but with the aluminum heads instead, what will his compression be?
I'm not a lawyer, I'm genuinely asking.
That said, the B-car tables were written for 87 octane, whereas the F- & Y-car tables were written for 91 octane.
So if he uses F-car spark tables, he should definitely use 91 octane.
PLEASE feel free to correct me if I'm wrong about any of this.
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