I recently did the 4th gen rear swap. I went from drums to disk. I intalled what I was told to be a rear disk prop valve from a 91Z28. When I drive the car I hear a loud rubbing sound. It sounds like the brake pads hitting the disks. I installed new pads and disks before I put the rear in. So I fugured maybee they just need to get seated but the noise hasent gone away after a week now. The noise gets louder and quicker sounding as I accelerate but the noise doesnt stop when I push the brakes in, what I was wondering is if I wasnt sold a rear disc prop valve and actually my rear brakes arent doing anything at all? Is there anyway to tell the two differnet prop valves apart. I bled the system twice and checked the pads and rotors to make sure they are in right. Any suggestions guys? Any help would help.

yeah sounds like the pads are rubbing the disks....

i am not too familar with the fourth gen rear swap...

how do the brakes work though?

The brakes feel like they work fine... My old drums in the back were pretty worn out tho, so I maybe used to having crappy rear brakes. I am going to pull the wheels and give another look, maybee I am missing something.