Throwing a small blower on a high performance NA engine probably won't be worth the trouble. Will your cam help build boost or work against it? Is your torque converter flash point set to get you into boost? Plus, if your 408 is putting down those numbers then it's breathing pretty good. That blower doesn't flow the cfm to support a well breathing engine with that kind of displacement. I have a Novi 2000 on a 408 with a 3" head unit pulley (second smallest they make) and am seeing 11psi.
