Dilema

Ok, the plan is KB 146 +.030 pistons, LY rods smoothed, weight matched and sized, ported 213 heads with 2.14" and 1.88" Manley race valves, ported, forged .010 .010 crank, Performer 440 with a 1" open spacer, whatever headers I can beg, borrow or steal (just kidding) maybe some partial fenderwells with 2" dia, 42" long primary tubes, and a main stud girdle. Will get a mechanical cam but haven't decided on the specs. The headers are going to be the most expensive thing on the engine! Looking for mid 500hp but a huge flat torque curve all the way up the RPM scale.

Doable?