Those rh's can live. Decent clutch packs and bands. Some had an aluminum front planet. You will need a steel front planet. I would rollerize the gear train. Billet input and intermediate shafts with the second gear updates. A light car Like that shouldn't be too hard on it. Wouldn't hurt to do a direct drum. We do these all the time. Can't hardly keep them in the shelves. One customer keeps us busy with his. 1600 hp on fuel only in a regular cab 4wd. It's a race truck but the convertor has become the weak point. Sweet build though!