Waking Up a Turd

I would like to see you put an air gap or performer rpm or an LD340 on it just to see what kind of improvement you would get. But yes, at least 3.73 gears, more compression. The Indy/IMM heads look like a sure winner, but if your rebuilding it, I would be leaning hard, as in planning as a definite, towards a 4 inch crank.