Brake Bleeding Problem

We replaced the master cylinder and brake booster on my 1972 Camaro RS 350. Went to bleed the brakes today and have encountered a problem. There seems to be a blockage, or something between the master cylinder and the wheel on the rear passenger side. All the other wheels get a nice flow of brake fluid coming out of the bleeder nipple. However, the one on the rear passenger side barely trickles out. Is it possible that there is something in the line that is blocking the flow of brake fluid? Or, maybe a brake line might be pinched? Thanks for any help.

could it be a plugged bleeder nipple? have you tried taking the whole nipple off? if the fluid comes out after that, its all good.. if it doesnt, youre prolly right w. the pinched brake line..

Yeah, we tried that. Nothing.

huh.. could it be a broken brake master? like one of the lines are pluggd from the master?

Master Cylinder is brand new. We did see if it was plugged though. They still could be screwed up even when they're brand new. Nope, works fine. There is something called the "combination valve and switch", that's right underneath the master cylinder. When the brake lines leave the master cylinder, they hook into that and then, from there, go out to the wheels. We are going to check that this weekend. It's the original one installed in 1972. It would now be 35 years old and has 180,000 miles on it. It's supposed to be checked every 24 months, or 24,000 miles. I've never checked it. If that's not the problem, we're going to look at the brake line and see it we can see anything. Thanks for the suggestions though. I'll keep you updated.