KB399's will work good with 360 heads in a 318, you can't swap to magnums/edelbrocks/302's later if you use them since they are domes. A KB 167 will work too, it's a flat top and has around 9.2 comp with 360 heads.

I'm have a 318 going together with a set of 399's, planning on making a mild street motor with 308 heads and a hyd roller.