Tongue weight. Ah. Thanks.
And thanks for letting me know about the towing ability.
I was wondering whether the truck had been modified for zipping around the city rather than towing long distances. (Don't know how they would park something this big in the city.)
Prior owners have:
Replaced the original 5.7L V8 4BL with a rebuilt 1986 6.2 diesel with a banks turbo kit.
It does have new gauges to tell me what the turbo is doing.
It has a three inch exhaust pipe.
Transmission is now a turbo 400 with a shift kit and a pulling torce torque convertor.
He also replaced the belt system on the front to one that has a single belt rather than two or three.
Disconnected the air conditioner. (Fine by us, we open the windows
Am double checking whether it has an intercooler.