well i am thinking of doing the j/mod on my 97 xr7. the car has 111,000 miles on it. would you recomend doing this? or should i try to find a new or rebuilt 4r70w first and swap it in( of course doign the j/mod before install)? i know i need the frpp rear LSD differential as well. Thinking on 4.10's to go in, or will 3.73's be enough? the j mod looks somewhat intimidating. is it hard to do? or does it just look worse than it is? and any recomendations on torgue converters such as what rpm, lock up, non lock up? i figure before i work on the engine i should go ahead and do all the maintenance and upgrades to the drive train itself. also, i have heard some people have real hard shifts with the j/mod? is there a way to avoid this? i drive around 110 miles a day, so i want to improve shifting, but dont want earthshaking shifts while cruising around. is this a possible compromise? thanks for the help guys.