I have a 1990 wrangler 4.2l and a 1997 wrangler 2.5l The 4.2l has modifications that make it put out far more horsepower and torque than the 2.5 and I want to swap out engines and want to know what all I will need to do to make this possible The 97 has a 5 speed and the 90 model has an auto and I would like to bolt the 5 speed up to the 4.2l in the 97 any input and advise will be greatly appreciated thanks Michael41064