86 tranny in a 83
![Yikes :yikes:](https://board.marlincrawler.com/Smileys/marlin/yikes.gif)
you have to shorten the rear driveshaft about 6 inches, lengthen the front, move the crossmember, cut a new hole in the floor. basically everything you would have to do if you were going dual cases
get a L52HD from Marlin they will bolt right in to your 83 and its as strong or stronger than the 86 G54 tranny