You have the truck and trailer. How does the old IDI engine handle the load ??
Is your truck squatting too much when the trailer is hooked up ??
Those old trailers were pulled by those old trucks every day back in that era. We didn't have forums back then with weight police types telling others it can't do it without any actual weight numbers.
Sure they were a bit slow compared to todays trucks but everything was slow back then. Even the king kong 454/460 big block gassers which were the biggest engines (235-250 HP) in our LDT's of that era.
Just keep in mind the truck is 20 years old and from another era so don't try keeping up with the flow.
"good judgment comes from experience, and a lot of that comes from bad judgment" ............ Will Rogers
'03 2500 QC Dodge/Cummins HO 3.73 6 speed manual Jacobs Westach
'97 Park Avanue 28' 5er 11200 two slides