hi my name is jake and i own a 1972 chevy k20 long bed 3/4 ton 4x4. i have a eaton 3rd member ho72 8 lug rear axle and im wondering what i can do as far as lockers for it. im not familar with this rear axle and havent seen it except in my truck and one other truck. i have looked online with no luck for parts and or knowledge about this rear axle. i was told it has a limited slip 4.11 gear ratio. weather this is true is unknown. i'd like to spool it or go with a lighter equivalent of that. what would my options be. is there a greater benefit of swaping this axle out for a 14bff? this truck is a dd / whenever wheeler. tire size is 305 75 r16 dick cepek mud country on 06 aluminum dmax wheels. np 205 transfer case and th350 trans with a stock 350 290 hp crate engine with 450 460 cam carb headers h.e.i. let me know if you require any more info to better answer my question as i will answer to the best of my knowledge. also with this setup is there a special gear oil i should / need to run in it. and i do need a front seal for it right behind the yoke and it leaks out of the passenger side. the rear inside wall of the tire has gear oil on it and the 2 inch wheel spacer has gear oil on it. ideas? comments? all comments information would be greatly appreciated as i like to research and know what im tearing into before i tear into it. . . thank you jake. . .