Ex's might have the bolt stops on the crossmember? On my La when I swapped to starion lower arms and knuckles the stop on the knuckle hit on the lower arm or somewhere around there and gave shit lock. Might of only been when jacked up though.. I grinded them off and was sweet.
I wouldn't worry about rebuild kit.. It would cost more than motors worth. It ran pretty mint, didn't smoke or anything. And can always do that later if you have to