need 340 help

So what type fuel do you plan on running in it?

Mine has stock compression .040 over with J heads opened up for 2.02 /1.60 SS valves, TTI headers and it doesn't like just pump gas.

Have to add a little 110 to make it HAPPY

If I were to do it again it would have aluminum heads, buddy runs 11:1 408 stroker with aluminum heads and it is fine with pump gas

Lucky for me the fuel is available close to the house. The bad is when I'm out and need fuel. Even taking timing out it still want to detonate.