Scat 347 stroker kit?

[Ant]

Considering going 347 myself, my engine builder has built a 331 stroker for a cobra owner that dynoed at 460fwbhp, with a dog manifold, but it was about 11.1 comp, and then the roller cam or a rocker s**t.

331/347 I can keep my weight down a bit, but the gas aint that good here to go much over 9.5.1 comp!
I have access to a Mexico block and have to contact him to get the numbers for a previous post of a knowledgeable US Cobra owner who knows what is the best block casting.
I gotta have at least 450bhp otherwise it aint going to do a lot on the track, I am used to big blocks with big horsepower, so thought I would try something different, just as an aside have seen a 383 Chev go in a four door Monaro, it had a turbo 350 etc, looked nothing, and it blew 600+Cobra etc into the weeds. Some people turn up in their nz$60K engines and they dont seem to have that real horsepower that many well put together simpler cheaper combinations.

Would it be better if you are getting over 430bhp to go for a Dart block?

My ramblings, and then the decision will be made and I will be stuck with it!