From experience the hole for the zerk doesn't have to be lined up, the biggest issue is the open ends on the A-arms inside the tube taking the grease!!!! I did line up my holes but when disassembled the hole had rotated, it still had plenty of grease and the grease did ooze out the bolt ends(countersink the hole in the sleeve). Also your mounting plate doesn't take as much force as you think, the upper portion of the frame is where there always ends up being cracked welds. I've not had to repair or re-weld the angled plate, I welded gussets on the top portion to help spread out the forces. I welded a sleeve pipe on the lower drivers side of the frame to help support my lowered rack-n-pinion unit.
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