68 a body upper control arm threads whats enuff

so i know they sucked from the factory
whats a limit of saying no and replacing them i mean they do thread in from bottom loaded at all times with pressure so i dont see them just falling out
but im this far into it i fig i would ask for some input from the others

i dont know how good the repops are and i dont want tubular
and im not sure if i really under stand how to cut out the threaded area with out messing up the control arm to weld in new boungs inless there over from the stock ones were i would just hole saw around them and weld new ones in.
not much room for weld going that route to the out side lip of arm