We had a 77, 19' Terry. Nice unit. Had a front gaucho bed, curbside dinette and a good size rear bath with a small tub!
Features similar to todays units minus the automatic pilots. the biggest pain was the Dometic fridge with piezio lighter. It was at the end of the gas line so air had to be purged before it lit.
I wish they still used the room heater. No fan to wake you in the middle of the night but very efficient.
Previous owner had pulled the breakaway pin and fried the brake magnet wires so they were all replaced.
Fresh water tank was a mickey mouse affair and had to be replumbed and secured. Good part was you had full access by removing the gaucho bed panels.
Electrical was like a modern unit. All 12v and used a converter when plugged into 120vac. A/C ran only on 120. Seems like the converter was in a cabinet near the floor. You can probably hear it when plugged in.
The rig towed well and didn't need the equalizer hitch but did need a sway bar when towed with a 3/4 ton truck or van. 1/2ton needs an equalizer. Ours weighed about 4500# with half a tank of water.
Good sturdy unit with metal roof. A good intro to RVing for us.
Norm