318 low budget build

keep the 360 heads, if you can afford it, get taller pistons deck the block and heads, can get thinner gaskets and get some compression back. Look at Engine Masters winter 2006 vol 9 no 4, they built a 415hp 318 with 360 heads on pump gas and kb167 pistons but they stated they had to zero deck for the pistons, and mill the heads to a chamber volume of 60cc and 2.02 valves, good luck