Id check the rubber hose that goes to your caliper, my truck pulled to the left and it was the right hose that was bad. They get rusty on the inside and clog up not allowing any pressure to that side causing it to pull. Its a pretty common problem, definitely worth checking out. Good luck. Since yours is pulling to the right, id suggest checking the left(driver side) brake hose.

 

front hoses and brake fluid flush will fix this

 

You should never just replace just one caliper both should be done at the same time. You could look at changing out the brake lines as well chances are good it's just the caliper.

 

When I first bought the 1994, brand new, it pulled to the right A LOT when braking.....turned out the idiot on the assembly line had twisted the rubber hose, took the caliper off, gave it 1 turn, reinstalled and been working fine ever since!

 

Well that would be great if it was the case! I think once I have a chance to do everything (Early January) I'll be taking HeyYou's advice and overhauling both brakes.