The J-Mod is not much more than a shift kit.
Establish a relationship with a tranny shop that you can trust.
They will have no trouble doing this "J-Mod" to your tranny.
I took the three Tech Articles on the tranny to my local tranny shop, and they charged me $100 in labor to do the work. I provided the parts, including a pre-drilled separator plate that I got from "The-Man" himself.
Steve - TCCoA member
2003 Crown Vic LX Sport
1995 T-Bird LX 4.6 retired at 247,888 miles
Thanks for the ride !