Which 360?

Only the very early yrs. had the thicker cyl. walls. Usually anything newer than 72 wasn't thick wall but it's a slight possibility if it was a very early 73. The only way the 79 360 is a E58 is if it came out of a little red express truck. Regular pickups didn't use the e58 engine.

They all have motor mounting ears in the same locations.

What I'd do is try to verify the mileage on them. Get the one with the lowest miles. It'll probably have the least ammount of cyl. wall wear.