I recently bought a new 98 Mark VIII its got 50k on it, and I've been going through it. The main thing I dont like is my 93 and 94 with 93 ECU were so much faster. I've already tuned it up, put in a 255lph fuel pump, and a K and N air filter. The next thing I want to do is get that nice firm shift I was used to. Right now you can barely feel the shifts at all. I just had back surgery so I can't lay under the car and take it apart, so what I want to do is find a seperator plate and do all the JMod work to it then give it to my mechanic and have him put it in. At least it will give me something to do and I'll be working on my car sort of. What years interchange? I keep seeing 2000 and up everywhere.