Try a 9.5-1 max compresion engine with 360 heads (Or bowl ported 318 heads. Your looking for about 220 cfm intake flow and approx. 70% of that for the exhaust flow.) and a Comp Cams XE268H or 340 cam, headers with a free flowing exhaust @ 2-1/2 inchs and a H pipe. RPM intake and a 750 carb.
This should be worth 350 HP (5500) and about 380 lbs of torque. (4000)