440 /super charger add on ?
Looking at the 8-71 chart, and by my
estimation based on the info you've supplied so far, if you under drive by 20% you'd be in the 4-6 lbs of boost range.
Guessing you have 1/2" pitch pulleys (I'm using 8mm pitch with vastly different tooth count). As an example, if you use your 36 tooth on top and buy a 29 tooth for the bottom you'll be a little more than -19%
Again, from Dyers....
Running the pulleys you have might put you in the 10 lb range - or the land of detonation for your combination. The charts serve as guidelines.