I took this as how much boost can I run until I run out of fuel lol...
saw you had a built motor so I assume it will handle pretty much all the power the D1 will dish out? What shortblocks in it?
You can calculate the rpm of the blower and figure out how small of a pulley you can run without exceeding the max blower RPM.
As long as you're running decent fuel and the compression of the motor is lower for boost I would think you could run quite a but of boost without issue, 15-20 psi but like he said, talk to your tuner.