How hard would it be to swap out the series II from my 01 grand prix gt with a series III? From what I have read the series III seems to be the way to go, and my car needs a motor so just weighing my options here. I do have a 2000 GT that I bought with a really good motor but transmission had went out. Only problem is the UIM on my GT, my spare GT, and my brother in laws GTP is leaking, and I read where they did some upgrades to fix this issue with the series III.
Any input would be great.