In terms of it working....

150bhp no problem at all, done it loads of times on different engines at the 100-150bhp ballpark.

Double that if you set it up right and the ehxaust side of things is free flowing enough.

But how you expect anyone to tell you if your internals can take that when you havent said what power you have to start with is beyond me, you could be on 800bhp on a set of cheap steel rods now and already taking risks for all we know

And what about the block itself?
550-600bhp on my LET block and it shat itself, but all my nice shiney steel internals are still fine, just the block isnt, likewise on Rod's YB when he went to the push sytem on it on the old engine.