318 /360 head? intake.
What are you going to do for pistons?
Stock 318 pistons may end up under 8:1 compression with the 360 heads.
You are going to lose about 1.2 compression ratio by using the 360 heads on a 318? If you buy 10.5 compression pistons and put them in the 318 with the 360 heads, you will end up at 9.2 compression.