Other owners in the past have bored 1" holes thru the back of the crossmember for socket wrench access, knocked the weld-studs out and simply used grade-5 or grade-8 bolts and nuts. While the fix with holes might be quicker and simpler, your fix likely stiffens up this area. The stock setup is flexible- enough that mounting a 1" OD solid swaybar may give you LESS cornering power than with a 7/8" bar, due to the crossmember & frame stubs flexing. Good work!
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