What year 360?

All depends on how you look at it. The newer magnums have a couple of advantages though you might consider best. They are newer so probably less worn. They also use roller cams which is a help in attaining the horsepower level your after cheaper. The only drawbacks I can think of is I've heard some guys having problems with the truck mounting ears on them (they have both car and truck mounts cast onto them) hitting headers so you might have to cut them off. Also you have to run magnum style heads cause they don't have oiling provision for LA style head rocker shafts. There is one possible advantage of an older LA 360. It's possible to get lucky like I did and find a early one that has real thick cylinder walls. I have heard for years that early 360's (before 74) had thicker cylinder walls but that has been debated alot on the board here with alot of guys saying they don't. Well I have a 73 that has super thick cylinder walls. I had it sonic tested and the thinnest major thrust wall was capable of being bored .060 over with no problem and my machinist said it could go .080 over for a lower power application. Only problem is finding one of them. I got lucky. Over boring alot like .060 or .080" isn't necessarily a great power adder but rather the thick cylinder walls are more rigid to hold ring seal better. Especially under high horsepower applications.