318 or 360? That is my question...

I think, if the goal is daily driver status, and given the history - that I agree with moving on one way or another. The fact that this 318 has oil pressure history would make me nervous anyway. Good running (read as original condition) 318s are easy to find and buy cheaply and it's a afternoon of mild wrenching to replace with few parts needed. So I'd go that route if you have access to some hand tools. As soon as you take it apart you incur costs - even if what is discovered is not a fatal issue.
So I'd find another 318.