88-92 are non lockup (two wire), and 93-95 (three wire) are lockup for the gas A518/46RH, 96 and up (big multi wired) are electronic governed and lockup. 518s use the same converters as 727s, 24 spline non-lockup and 23 spline lockup. Stock 727 kickdown linkage can be used in most swaps, though some will need a cable setup. If you have floor shift a few people have successfully made brackets to run stock shift linkages, and some have converted to cable setups. The big deal is the trans tunnel, you will need a custom trans mount cross member and may need to cut and re structure the torsion bar cross member, there has been some success trimming the reinforcements on the overdrive housing to clear stock E&B body tunnels. You will need a shorter driveshaft (727 yoke). The cooler lines are 3/8" instead on 5/16"

As far as controlling it, it can be as simple as a switch or as complicated as an electronic controller. Many early conversions used floor mount high beam switches. http://www.transmissioncenter.net/dodge.htm has an inexpensive way to control it automatically. There are also a couple of control modules, but they are expensive and painful to set up.