How Would You Build This Stroker?

It seems that what you're looking for can easily be done with a stock stroke 340 or 360.

My build is pretty similar to what it sounds like you're looking for and it can be done under budget (I spent about $7200 since I scrounged used stuff, but about 9k for a completely new one). It made 470.9 hp at 6000 and 455 lb-ft. 400 lb-ft from 3000-6000.
http://www.forabodiesonly.com/mopar/showthread.php?t=241854

The thing just flat out works. Nice and docile on the street, and pretty mean overall.

With a stock stroke, the important things you'll need are:
Quench (0.035 to .040") - basically a zero deck piston/block and closed chamber heads
Heads that flow (edelbrocks work well if they are cleaned up)
Hydraulic Roller cam
Light piston/rod/valvetrain (think Scat I-beams or K1 H-beams and beehive springs)