You have a few days of reading ahead of you.
You need to understand that a GT and GTP arent so much alike.
Sure the motors and trans carry the same name, but each are alot different.
GT is 9.4:1 compression and GTP is 8.5:1, GT trans has 3.29 gears, GTP has 2.93's. Both have the same strength, both will die with enough power.
97 GTP PCM is year only and MUST have the wire harness to use it in another car.
You'd be better off top swapping the GT, instead of swapping motor. Whatever you decide on will need a full on custom tune to make anything work.
