R.O.P.S. structures, suspensions, engines and transmissions, cabs, dump beds, logging truck bunks....are all held on with bolts, some like R.O.P.S. by OSHA and MSHA law. Farmer class welders welding on heat treated frames without experience may not be the best option. For starters a 1/2" grade 5 hex bolt has a shear strength of 70,000#....so 8 of them, 4 per side, you are looking at 560,000#. Do what you want, it's your jeep.
