MaHaley Huckaby

I have a 98 gt with a 94 supercoupe swap engine . 3.8 liter v6. The problems we are having the most with is figuring out the best cooling systems for this car to keep the motor from getting to hot and the head cracking. I've read that a 98 gt fan is the best , just wondering what anyone else has used or any other things that are a must to avoid an engine replace !