360 Swap for the 65 Dart

Getting ready to do the swap, 273 coming out, mild 360 going in,

can we get a checklist for things to lookout for?
I have the motor mounts

What do I need to do for keeping the '65 904 trans.?

I see threads about it, talking about a special converter, or a bushing, but what's best and who sells them?

What else do I need to do or check?