So in the near future I will be swapping a VG33E into my 1993 Pathfinder. I already understand that it will bolt in fairly easy and I'm sure i will run into an issue or two along the way. I also understand that the stock ECM will run the VG33E without much issues.

What I am curious about is,
1: will it be worth it to tune the ECM with JWT?
2: from anyones experience how much of a gain will the JWT S1 Cams give?
3: will i need to tune the ECM if I put the bigger cams in?

All input will be greatly appreciated