I have a 1992 regular cab and would like to pull a 1400lb travel trailer. Does anyone know the towing capacity of the B2200 or have experience doing this.

I towed a trailer with two golf car slots on it for about three years. Average weight of each golf car is about 800 lbs. The trailer didn't weigh much more than that by itself.
You should be fine, but I'd look into trailer brakes. I went through rotors every eight months.

I also had to add a helper spring to the rear suspension.