Any change in motor mounts 318 to 360?

The left side mounting lugs on a 360 engine are not exactly the same as a 273/318. The rear most boss is closer to the front ones on a 360, so you need to fill in the 1/4" or so space either with washers or weld a piece of metal to the inside rear of the mount and redrill the hole. Also, if memory serves me correctly, the right side 318 mount will only bolt up with 2 bolts. Again, you can add a piece of triangular steel to the 318 mount to pick up the third mounting boss on the 360. If you need some photos, I have some around somewhere that I took for Cerwin.