what should I expect and is that too much to ask for?

What rwhp/rwtq Should I expect from Stock block with 100k rebuilt to 306, AFR 185's, Andersons B21 cam, Gt-40 lower, Blowzilla Kenne bell w/ bypass 9psi
90mm maf from kenne bell
75mm Tb
42# inj
Full exhaust
GOOD Tune
My estimation, H/c/I alone 300rwhp, then 123+rwhp from the KB, Is that realisitic 400+ rwhp with a/c, full belt,and most bolt-ons

Is 9psi too much to ask for on a stock block w/ better HG, will I run into reliability issue(blowing hg's)? What will a Setup like I mention be lacking in the powerband? Is 11's "realistic" in a full weight lx hatch? Would 3.73's be too much gear with the blower, I really want 4.10's, but they will be too steep?

The Goals and one big concern is will that be enough to hang with 03' cobra stock/lightly modded or will that be enough to take modded ls1's...I want to be able to toast stock ls1's and be able to beat a few of the mooded(full exhaust, cam'd,) ones with the amount of effort ill be putting into my mustang, I want the mustang name to stand up for it self and not have ls1's be beating on me. What your take on this, will I be able hang with the big dog's(ls1's, ls'2s, 03' cobra, Evo's, sti's, gto's)