I’m pretty happy with the 01 PMT1 computer I put in my early 99. It made it shift a little better and definitely has more power without the chip. Easy to swap, took 10 minutes and cost $75.
When I ordered my BTS valve body they were very happy when I told them I had the PMT1 computer and the valve body is what finally fixed my shifting problems.
My original computer was an XLE4 which I fried and replaced with an XLE8 before I knew about the PMT.
Thanks to strokin and all the early 99 guys for the advice.