hi i have a 93 2WD ranger with the 4.0 in it and i recently purchased a 94 4WD ranger with the 2.9 in it both have automatic transmissions i was wondering how complicated it would be to swap out the 2.9 for the 4.0 also i was told that i would have to change the computer which leads me to another question. being that the 4.0's computer would be out of a 2 wheel drive will it present any problems putting it into a 4 wheel drive any advice would be greatly appreciated

__________________