I just did an 88T5 in my 53 1/2T with the adapter plate from Hamilton Intakes. It was worth every penny of the $129.00 I spent. Just had to bob the shaft housing and it all went together. The bolts they sent me were'nt long enough, but a trip to the hardware store fixed that. 82-88 is the trans to get anything later has electronic speedo. Good luck, there out there.