Val

318 and 360 blocks are super similar. Ostensibly this should have been a pretty straightforward swap.

It was almost completely done at night, in the rain, half-out of a shop that was just a little small for the car. Naturally, there were some hurdles with the swap, but nothing that a little money and a lot of time couldn't fix!

Differences you gotta think about:

Motor mounts. They're different. Get the right ones. It would appear that some blocks have different mounts (closer together) on the drive side. You can get a specific mount from Schumacher, or just weld a spacer in there.
The 360's are externally balanced (not internal like the 318's) This meant either getting a weighted flexplate, or welding a weight on the torque converter. I went the latter route. (see pics)
Truck oil pans are different from passenger car ones. DusterGlenn was able to hook me up with the right one (thanks buddy)
There is a brace that extends from the trans-cover to the block. I had to lengthen it on the drive-side. (cut, threw more metal in, re-welded).

For a way better article on the job, check out: http://www.dippy.org/forum2/index.php?topic=53.0