Before you go to the expense, I would suggest that you check out the condition of the "knees" and the stringers. Rangers do not split the cap from the hull, so the only way to do this repair is to cut out the splash well, perform the transplant, and re-glass the cut out section. I did a transom transplant on my former Ranger a number of years ago. It is a lot of work.
A very good resource is the "bassboat restoration" sub forum on Bass Boat Central. https://www.bbcboards.net/forumdisplay.php?f=118