70 Duster 340 w/ 20ft Pace Trailer

How old is the trailer and are there any room front or back to balance it out on half ton pickup.im going to get a loan to make an offer on car and trailer.
It's a 1991 20ft Pace brand race trailer.
Balances out just fine where I strap it down with the front tires still on the aluminum runners.
With the car in that location there is about 2+ ft from the front bumper to the cabinets and about 1ft from the rear bumper to the rear ramp door.
Fits perfect.
Can be towed with a 1/2 ton full size V8 pick-up without a problem. Need to have a 7 pin round connector or at a minimum a 4 to 7 pin adapter

5 new tires, Upgraded to 225r/75-15 10 ply load range E, steel valve stems.
Brakes work good,
Winch,
Storage cabinets,
Sink w/ 12v new pump,
Full set of straps,
Race fuel can,
New air tank,
12 and 110 volt interior and exterior worklamps,
LED interior spot and exterior LED clearance lighting,
110 inverter,
Microwave,
Mopar Banners.
Recent 65 series onboard battery.