572" Hemi (4.5" bore x 4.5" stroke). Built it myself.
KB block, Callies crank, Oliver billet steel rods, 11:1 Diamond pistons.
Custom solid roller by Dwayne Porter...276°/284° at .050", .672"/.651" lift. Really mild lobes for street durability.
CNC ported MP aluminum heads by MCH. DLI roller rockers.
Ray Barton single 4500 intake w/ a Pro Systems 1200 cfm dominator.
2.25" primary, 4" collector TTI headers. 4" exhaust.
727 w/ 9" 5k stall, 4.10 Dana, Caltracs, 295-65 drag radials.
Pushed my 3850 lb. cuda to 9.54 at 140.4 mph, 1.320 sixty foot (footbraking). On pump 93 octane.
Should be somewhere in the neighborhood of 825 hp.

Now at over 3900 lbs., but w/ nitrous, I'm hoping to get an 8 sec timeslip this year. Went some 9.30s last year spinning the tires.