Brakes are sticking.

[Cowboy5]

I have a 72 Chevy 4wd. I recently put on brake pads on the front. Well the pad on the drivers side was grabbing the rotor and not releasing the pressure. I have tried to bleed them off. I tried to bleed the proportioning valve. I am going to try and replace the caliper to see if that is the issue, but don't want to replace it and that not be the problem. Anyone have any suggestions.

And by the way I want to thank VetteVet for all the help. He is a very knowledgeable person when it comes to repairing motor vehicles. He helped me get all the lights working. And for me to do electrical is amazing. Thanks Dude.