Thanks Donald,

I just got my World Block and Callies Crank back from Impastato Racing. We ended up taking the Block out to 4.395 Bore and just had the Crank gone through by Moldex. Should end up with 516 Cubic Inches. Still sorting out the Top end.
I plan on running a 727 Trans with a 10" PTC converter. Stock front suspension and one of The Irons Works 4 Link Rear Setup with a Dana 60 Rear.