you just have to be creative when you bolt the hinges to the tub under the tailgate. I have a '91 tub on a '76 CJ-7 frame and used the original tailgate. You will have to weld up or plug the old hinge bolt holes in the tub.
__________________ Mine: 1987 YJ 4.2 5spd soft top
98% of people when they are about to go into the ditch say "oh shit!" The other 2% are Minnesotans and when we are about to go into a ditch we say "Hold my beer and watch this shit!"