Since you're pulleying up that far I'd say maybe ...give or take. Heck, look at it this way ...if you conservatively estimate 15 rwhp/lb of boost that's 225 rwhp right there. Then add your typical 375 rwhp 355 and you've got at least 600 right there if you have good heads. With proper tuning and a full 15 PSI showing on that gauge you may get more like 20 rwhp per pound and 650+ though. This is grossly oversimplifying of course, I think 650's a pretty decent estimate as long as the heads are good and the fuel system can support it.