It was the right (passenegr-side) caliper that began sticking on me, too. It's one of the reasons I parked the truck until calipers could be located.

It's always a good idea to replace both sides of any brake work at the same time. So I hope you replaced both calipers.

Lucky to find a junk yard motor, but you will be putting 200,000 miles on the one you already have, I'm sure. These engines are pretty tough, and some loving care keeps 'em going happy.