I have an almost brand new NAPA brake master cylinder that I bought new from my local napa store about a month ago. I can't find the receipt but I paid $65 for it. It fits an 83 Toyota 4x4. I'm not sure what else it fits but the part number is M2568. I ran it about a week and no more than 25-30 miles and I realized my brake booster was bad. I went with a dual diaphram booster an a bigger brake master cylinder. Like I stated I paid $65 for it. I will take $50 shipped.
Text me at (70six) 68one- three four 32
Email me at mtrdud322@aol.com
I can provide pics.

 

Update your post to include a locaton

 

Georgia

 

I wish i could fit the dual diaphragm booster on mine...

 

You probably can. What year truck?

 

82, i picked up a dually from a 95? 4runner, so i could use the 1" mast cyl too. it didn't fit on account of the steering shaft having a u-joint right where the booster wanted to be. there diameter is to big unless i can somehow get approx 3/8" of clearance (minimum) to make it fit.