The DOM tubing is available from any of the online metal suppliers,
bout forty or fifty bucks worth. A 3/4-16 RH tap most machine
shops will have and they might even have a left hand one on the
shelf, if not, McMaster Carr has them for about the same, forty
or fifty dollars.
Worth the trouble? Maintenance free compared to the original
ends, and you gain enough clearance to run many of the tubeless
rims that will not clear the original ends. Also the tubular
tie rod is much stiffer than the 3/4" solid rod originally used
on these trucks.
Denny Graham
Sandwich, IL