You can mill the cyl head to raise the compression a bit, but, just my opinion, this build is going in the wrong direction, I do understand about no $ & little time to get it all back together.So sometimes you need to compromise just to get your car running, been there done that.
I would definately lower the boost down to 3-5 PSI. Just because you have no intercooler, no methanol injection, no MSD boost retard or simular set-up. Also, you are using cast pistons.
Curious as to what octane fuel are you going to use for the fuel cell? Is that a 10 gallon cell?
