Thanks for the reply hudlenutz. I wasn't thinking before I posted the reply about the 5RZ, I don't want to have to buy an R series tranny. I want to stick with the W56 that I've got in the garage.
Looks like ORS sells a wiring harness to make it easier to convert a 22R to 22RE for $400. Would something like that be helpful in my case even though I am going to be using most of the 3RZ harness?