you need a trans and converter. If it is four wheel drive you also need a input shaft for the transfer case to but up to the transmission. It has to be the longer one for the RH instead of the short one for the RE. The standard input is too large. You need two switches in the cab. One is a grounded switch for O/D and the other is for lock up. You need 12 volts going to the trans as well. You need a flexplate (91-02). You need a trans mount for an RH. You need shift linkage and you need a auto steering column or a big ratchet shifter. You need a trans cooler and trans lines. If you decide to go with an RE then you will also need a PCM, wiring harness, O/D off switch, and lots of patience, lol.