I called 3 dealers in Colorado Springs, 4 in Denver, they all told me it was a discontinued part. Am planning on switching to vacuum brakes this summer.
at this time It most certainly is not discontinued. most dealers cannot look it up due to the age/obscure nature of the car, there is a current part number posted around here somewhere, my local chevy dealer can still get it in for me.
Now that I have driven vacuum and PMIII cars I can say I would never swap PMIII for the vacuum stuff. PMIII has superior stopping power over the vacuum brakes. It just takes a learning curve and sometimes a bit more money to fix right, but it is worth it to me. I'd rather spend the money then go through all the work to swap in an inferior braking system.
