440 /super charger add on ?

I don't know what your static compression is right now but a .125 gasket is only going to lower it about .5 to 1. That's a bit of a guess. It would have to be a multilayered gasket to work. The other option is to underdrive the blower and retard the timing to keep detonation under control. You could always add a water/meth system as well.

Jack
was told that with the 906 heads..they have 88 or 91cc chambers I don't remember,and with the 30 over flattop pistons,its right around 9 and a half to one compression if I stay around 5 to 7 psi boost, shouldn't be to much of an issue but lowering the compression would help