Not Ranked
10.5 to 1 with alloy heads is right on the edge, but yeah, you should be able to get away with that AND maintain a decent timing advance curve. You could get away with even more compression by reducing the max timing and curve of when it comes into play. This was primarily what I did with my 12.5 to 1 and iron heads, reduced the timing, worked OK. BUT, running race gas and advancing the timing was like night and day in the power output!
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