The mounting ear where the mount bolts to the block on one side is about half an inch narrower on a 360 bs the 318. The other side is the exact same as a 318. I forget which side it is off top of my head I want to say the drivers side
Yep, drivers side.
Fortunately the way the mount goes on the ears of the block (in front of them front and back) that 1/2 can be made up with a spacer.
IIRC there is one bolt hole on the drivers side that doesn't line up at all.
The lower rear one I think.