600 at the wheels sounds possible I would think. With all the block and head work, 11 pounds should produce 4 and change pretty easy. Add the 150 blast and (conservatively) 550 at the wheels would be my min. estimate.
PS- Rob is certifiably a maniac. (In a good way, no offense) He emails me the pics and asks when and what Gerry is doing to my car, like if he's doing the block too. He adds "I should get the block done so I can run 15-16 pounds , and a NOS Shot for GOOD MEASURE ! Sane people don't consider a NOS Shot "Good Measure!!!!!!! Like it was Flu Shot or something! Hilarious!