i tossed my useless dana 60 out and replaced it with the 14 bolt on my 1979 with a 76 frame 4x4. all you need to do is cut off the spring perches and weld them on again to match your truck like the old 60 was. i would keep the 14 bolt perches as they are boxed in and solid. the thin cheap ones can collapse and ruin your pinion angle that you just set up. as far as width they are pretty close to the same. i am running 49 iroks so width wasnt a huge deal as my tires were going to sit out 6 inches anyways. you need to make sure you find the full floater rear single wheel axle though. get rid of those drum brakes though with an easy swap kit. may cost about 300 bucks to do it and is really easy. the rear yoke is going to be a 1350. you should just get the driveshaft cut and put in a 1350 weld yoke on your shaft. or just get a 1330 pinion yoke if thats what you have. i ended up getting a 1410 on mine with a heavy duty cv for help with my angle. if you upgrade one thing you then need to upgrade something else to get rid of the next weak link. it will never end. good luck