I had something to say, but it's already been said, and I don't usually add "yeah what he said"!
Pardon me, Mr. Politically Correct!!
And who was raking whom over the coals for not using their backspace....hmmmmm??? [8D]

 

dude calipers are fricken cheap, like 10 bucks a pop and pads are the same. just go buy them and install them and if thats not the problem then go onto the more expensive stuff like lines and proportionong valves and even the master is only about 30 bucks. in my 84 I have 1 caliper that just dont wanna work and its new as is the master, so I gotta go the proportionong valve route. and yes I have already replaced the lines, which leaves just one more item that is the P valve. ( now thats pricy something like 80 bucks). so far with new lines pads and master I got something like 80 bucks in her.
ppl on here are very very smart about what they say. they have helped me emensly. and I mean none any disrespect, but sometimes they get into it in a fun way amongst themselves which just confuses they heck out of a newby. sometimes it sounds like they are married. LOL. after you been here a bit and read post not related to anything your interested you will see.
like mentioned earlier, with exception of the P valve will cost you less then 100 bucks

 

I'm married to 350rs but am seeing Camaro69 on the side.

Shhhhh don't tell any body

Jim
I would not jump into getting the valve if one side is not braking properly. The valve is for a balance between front and rear. If the balance was off it would make the brake light illuminate. Thats what the wire is hooked to it for. You checked all your steel lines. don't have any that was pinched some how.

 

I looked as best I could but saw nothing too bent, and I did kinda figure the lite would come on, so maybe I will just re replace that passanger side line and see what happens. its far cheaper then the valve at this point.lol. it could be pinced were I have a hard time seeing.