There is a lot of patch work welding, it seems that simply extending them would be easier, and not require the upper ball joint to be moved from the stock location. Too bad Toyota didn't use longer A-arms with the T100, it would have been a common swap by now.

More than tread lightly. Leave it like you were never there, nor anyone else.
'90 X-cab 4.88's 33 BFG AT's, rr ARB, Headers, Ignition upgrade, cold air induction.
'91 X-cab 5.29's 315's BFG MT's, rr ARB, custom bumper and flatbed