This is my second motor going to bigger compression first one 548 10:1 went to 15:1 seen slim to no difference. I am actually up on hp/tq with this one on the dyno but think its slower on the track.

Better flame travel with less compression seems to work good. I think you'll be fine

Thanks David, I did order nitrous pistons just in case I need a little more power. How much hp do you think it will make on motor? How does this compare to your combo? Thanks

That combo should dominate mine, 18 degree heads and 50ci more. Depending on which big chief heads they are i'd think it'd make around 1125hp on a honest dyno