318 - Magnum Engine Swap

In a 1974 Duster:
1. Do I need special motor mounts to put a Magnum 360 in where a 318 came out?
2. Will the Magnum bolt up to the original 904 auto transmission?
3. What year did Magnums go from Carburetors to Fuel Injection?

Thanks, DickJ
Can only answer 3. All Magnum were fuel injection.