318 with 360 heads

That depends on budget. I like the Scum it(Summit racing K6901 grind, it's healthy enough!), Look for 302 /Magnum heads. If you are not broke,check out RAMM's 318/347 stroked threads....
X2 on the 302 heads..will increase your comp and be pretty torquey even in stock form,that summit cam a good carb/intake......if you use the J-heads run the 1.88/1.60 valve[stock] milled about .050-.060 use steel shim gasket it will perf well just need a min of 3.55 gears or steeper to help get it winding...smallblks like the steeper gears...there was a fellar on here in the past Bobby[BJR RACING ] did a few combos on 318's[322's] and 302 heads that was pretty damn good and well worth reading...