How Big can a 5.2 get?

I bought the heads and Cam last december and I planned a 030 overbore, KB pistons etc. But, the parts were on the way (over sea) for six months because of several reasons that I couldnt affect. And during six months, well.. You get new ideas :) What I mean, I dont want to build a stroker which ends up a dog, just to build a stroker. Im aiming In 350hp range with 3.31 stroke and 4.00 should make well over 400, otherwise its not worth the extra money.
I took the heads with 1.92 valves.