On another site (chevelles.com) Tony Mamo (the lead head guy at AFR) just posted about a motor very similar to what you are after. Here is a rundown and then the post.
540 CID Shortblock (Eagle rotating assy w/ JE/SRP pistons).
315 AFR heads (I did some light porting) w/ tulip valve angle milled to provide 11.0 to 1 CR
Vic Jr. Intake with a good gasket match and clean-up in the plenum
Holley 950 HP carb (4150 style)
Custom Comp cam (solid roller) 256/256 @ .050, .680 lift 112 LSA installed at a 109 ICL
ATI Harmonic Balancer
2.125 Headers....(not sure about the other exhaust components).
644 RWHP
620 RWTQ
If you assume a 18% loss through the driveline, that puts it around 750 at the motor. I realize that there was a little porting done on those 315's but I still think you would be over 700 pretty easily with the Fully CNC'd 315's out of the box on that combo.
http://www.chevelles.com/forums/showthread.php?t=201808
Adam