I currently have a stock 10 bolt open rear with drums. I'm going to be installing a 9 bolt I just picked up after I get done rebuilding it. That means I'll be swapping out the drums with discs. What do I need? I have a proportioning valve but what else? I have rotors and calipers so far.

 

i'm doing the same thing I have 2 cars 1 9bolt going in the other has a 10 bolt w discs going in. Thanks for the info in advance guys

 

If all you have is rotors and calipers, you're a ways off yet.

If the calipers are cast iron, don't bother.

If they're aluminum, they're worth tracking down the other parts for. You'll need backing plates and caliper "abutments", parking brake lines, and fluid lines.

If your calipers are the cast-iron ones, your brakes will probably work worse than your drums, after doing what it takes to install them. Spend money to shoot yourself in the foot in other words. Sell em to the next "greater fool" and start looking for the aluminum (PBR) setup instead.

 

While I appreciate the sarcasm its not helping me much. I have the iron calipers. I already have a rebuild kit, 3.70 gears, axle seals and wheel bearings ordered for this rear. So I'm not selling it to the "next greater fool".

I have the hard line and one rubber line for the calipers. I found a new set of brake lines and the PBR calipers. Its a bit more than I originally wanted to spend but it is what it is. Now if I buy the PBR calipers do I need to buy any adapter plates or will they bolt up to the stock brackets? Also you mentioned parking brake cable. Some have said I have to replace that and others have said the OEM one will work.

I guess to recap, I should get the PBR calipers, new rotors, new brake lines, and possibly a parking brake setup? Is that it?

 

...and brackets for the PBRs

 

The brackets that are currently on the rear will not work? What about the backing plates that are on currently being used?

 

I found this kit. Will this cover everything I need?

BW 11.6" Rear PBR disc upgrade
This kit is an OE 1LE disc conversion for '89 and earlier 9 bolt rear equipped car. Kit is complete and includes: loaded PBR caliper set, Raybestos/Delco rear rotors, new disc backing plates, new emergency brake cable set, new axle hard line set (2), new braided flex line set (3), new GM aluminum disc proportioning valve, brake line tabs and clips, all installation hardware, and an install guide to help you through it

 

No the brackets you need (aka "abutments") are unique to the PBRs. None of the parts will interchange. THIMK: ... 11.6" rotors, vs 10" ones. The calipers are like out in another whole area code.

That kit should do it, assuming it has the abutments (doesn't say)... where is it from?

 

The kit is from Ed Miller at www.flynbye.com. I spoke to him yesterday and he said the kit is complete. The brackets are included in the kit. The kit comes with everything to add the full PBR system to the 9 bolt.

 

Though the backing plates are slightly different, the 9- and 10-bolt braking system is identical as far as I can recall. The following pics/part numbers may be of help:

https://www.thirdgen.org/forums/faq-...iscs-89-a.html

More info about combination valves, master cylinders and so on below:

https://www.thirdgen.org/forums/tran...-10-bolts.html

JamesC

 

You spoke to Ed? I didn't know he was still making kits lol. That's great, I'll give him a call!

 

Yup, his website is still up and I placed an order. I spoke to him email a few hours later to make sure everything was good to go and estimated shipping times. He quoted me 2 weeks for shipping and said he had everything in stock.

 

awesome, he must have just been busy last few times i tried to call. Good to know. Thanks