Need Advise

I'm building a 347 right now with the stock block, cast crank, forged I beam rods, and forged pistons. I'm hoping to get 400rwhp NA, but I know thats not going to be enough. What should I do to push that up to at least 450rwhp? I was thinking about nitrous oxide, but I've never used it before and I don't really know if I would like it.

what compression ratio

Between 10.5 and 11.5

so you haven't bought the parts yet i assume??

I've got the rotating assembly, the block, got the custom cam, headers, and the rest is already planned.

a correctly tuned Nitrous set up is like nothing else.

What heads are you going to use to get 400rwhp out of a 347?

The CNC'd 205cc Trick Flow's from Summit Racing. I'm also going to have a Victor EFI Intake manifold, 42lb/hr injectors, 1 3/4 Long tubes to 2.5" for the rest of the exhaust, and a nice healthy tune with my tweecer.

How high are you going to spin that thing? I don't see 400 out of that. But I could be wrong.

Well the cam is designed with a power band from 2800-5800, but I'm not saying that I'm going to get 400rwhp...I'm just wishing that I'll get as close as possible, while still keeping it a daily driver.