Small roots blower for smallblock

I'm thinking there is no way that 144 blower will produce 12 psi. These little blowers Usually pushed around 5 to 10 psi. Unless you have some huge crank pulley and a tiny blower pulley. I don't know, it's been a couple years since I was playing around with my stuff, so I have to check my notes. I think you will be fine with the pulleys you have.