Where to go next? Low 11's high 10's??

How much cylinder psi would a 175 shot make ? the big block outer wall look awfully thin. My builder was pointing out the spots for me since I bought some power adder rods (molnar) just in case I wanted to go faster. But I don't know nitrous, how to do the timing retarding or want to try to find another 400 block. I'll leave it to the fuller wallet crowd.
I just re commented on my nitrous A1A thread to kind of reopen the conversation there and not muck up this threat anymore.. hot metal has answered many questions in the thread as well...