There's nothing wrong with True Temper tubing. Early 80s Treks were made from TT's first foray into bicycle tubing -- IIRC instigated by Trek looking for a domestic supplier. Unlike the more expensive seamless Reynolds 531, Columbus SL/SP or Tange Champion tubes, it is a seamed tube but cold drawn after the seam is welded to create the butting and obliterate the weld seam.