Best 273 and 318 builds (NO 360's please)

Just got my '70 318 block back from Carlson Machine in Salmon Arm, BC Canada eh....

bored .030 over
4.00" cast scat crank
scat I beam connecting rods
kb847 pistons
302 ported heads w 360 valves
Comp Cams Mutha' Thumpr, 287TH7

pushing for 400hp in my 70 swinger clone