B-block cylinder heads?

You are building a stroked 383, right? This point was mentioned way up there, but most recomendations of heads have been talking about a 383 CU IN motor. I love this kind of bench racing, and read this with interest, but I think the fact you're going to stroke it may change peoples' suggestions.
A good head will flow the nitrous, I believe all you need is a cam that favors the exhaust duration a bit, and some have suggested a bit more lift there as well. Lobe separation is better for blown, and nitrous engines as well.
Over on Moparts, they've got a group buy going on E-brocks with CNC porting. I'm getting mine done, and they should ship to me soon. I know they sound like a good head for your app. I just don't know if they'd be in your budget, being a high school kid. $2K. PM me if you want the contact info.