Engine Swap????
 

I have a 96 STS with a blown Northstar 4.6 motor and a buddy of mine has a wrecked 94 Cadillac Deville Concours with a recent rebuilt Northstar 4.6L. He is going to let me get it for a real nice deal and I was wondering is it possilble to put the motor from the 94 into the 96? And also what things would I have to change?