are any 340 and 360 parts interchangable?

I bought an '318' engine some time ago from a guy who had it in his Roadrunner and was replacing it as it had an front end knock. I didn't care as I was just going to salvage some of the parts for my 340 (new water pump and timing chain cover) and then sell the block. When I was cleaning off all the grime I thought I saw 360 on the block and sure enough, it is actually a 78 360. The previous owner did some work on it and he had replaced the harmonic balancer. How can I tell if it is for a 318? Are any other parts usable like the intake manifold?