wiring comes easy to me. Lets just put it this way, I just finished rewiring my 1988 Cutlass Supreme to use a 1996 OBD2 PCM.
I have most of the parts already. Wiring is not difficult as long as you have the proper wiring diagrams.
The problem with ALLDATA (and getting an aftermarket cruise control setup) is that it costs MONEY, and the thing is that I already have all the parts to do this swap. I just need to get the wiring diagrams so that I know it is installed PROPERLY.