I have the exact same pulley as your crank pulley 5.75" outer edge. So with a 3.2" SC pulley it's 15psi summer and 16+ psi in winter. I would go with the 3.4" sc pulley for 12 PSI. Can you post a picture of the DASC? That would help me a lot. Also are you sure it's a MP-62 gen 3 supercharger by magnuson? I would trade my 3.4" or 3.6" sc pulley for your 3" if our SC shafts are matching |