Swap out electrical internals and please jmod the 98 trans first. Only takes 2 bits and 30 min tops for your first time. The gaskets cost maybe $3 to $4 each for both. One hole is drilled with one bit and the rest are done with the 2nd bit. Flip it upside down and knock it out. Nothing to it. The instructions are in the "sticky" for the 98 trans.
Make the top two bolts of the trans easier for you and tilt the motor forward, after loosening the trans where it mounts in the rear. You can get to those top two bolts straight from the top and not have to use 5ft worth of extensions from underneath. Make sure the car is up high enough too. A helper is almost a must and rolling the trans under the car on a hydraulic jack is a big help too. Make sure the TC is seated properly or you will be pulling it back out again. Once it's in, crank car and begin filling with Merc V and after about 6 quarts have been poured in, you can run through the gears and it should engage. If not, something is wrong. If it does engage, keep on pouring and check for leaks. No more than 13 quarts should be needed. 12 to 13 will fill it, I believe. I had mine jacked up this high, with cinder blocks under each tire and jack stands and a couple of other small jacks. I believe in freak accidents way too much because they do happen.
It was a fun job but luckily I had help from a guy that has done mechanic work for more than 30 years. He was a huge help and would only accept $100 from me. Really, I helped him with the removal and install.