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