If the 360 head is a 974 casting, it can be made to work great. If it's not... I would stick with the 318 heads and do the work I illustrate in my 318 porting for the average joe sticky.
I even added another casting, flow numbers and pics a couple days ago.
What makes the 974 head more desirable than other J heads for a 318 swap? I've done some searching but wanted to ask while this post is still somewhat current.