"when I hook it up the TV sags LOW."
WD hitch and bars isn't going to solve this issue. Your 25/26 year old truck is the problem. No 1500 truck should sag LOW when the tongue of a 22 foot TT is attached.
Winnebago 2101DS TT & 2022 Chevy Silverado 1500 LTZ Z71, WindyNation 300 watt solar-Lossigy 200 AH Lithium battery. Prefer boondocking, USFS, COE, BLM, NPS, TVA, state camps. Bicyclist. 14 yr. Army -11B40 then 11A - (MOS 1542 & 1560) IOBC & IOAC grad