Will this parts combination work for a magnum swap?

Actually, the way the dmv lists vehicle year is not accurate, specially when you are talking about two years on both side of the split. You will have to confirm the pcm type with each vehicle to make a correct evaluation. One plug pcm is OBD I and three plug pcm is OBD II. You will also want to determine if the trans is either a 44RH or 44RE( behind a 5.2 it would not be a 46). A flat three pin plug is RH and a round eight pin plug is RE. The plug I am referring to is the solenoid pack plug on trans, not P/N or output shaft sensor.

First pic has OBD I plug on left and OBD II on right, second pic is solenoid plug on 44RE trans and harness, sorry but no RH in shop.