i need help

[hotrodhauler]

i have a 85 k20 4x4 dually flat bed  it has the most awkard hard to find brake parts in the world i need help because i wanna make this truck a hot rod hauler air bags paint chrome chassis restoration the works interior well the problem i encountered this weekedn when i started this endever is my brake in the rear are shot completely shot and to find new parts is ridiculous i want to put a nice disc brake conversion on the truck but it has the floating axles and i am a bit stand offish on what to do or how if you have some ideas of how or what worls or any thing please lend a idea to a fellow friend that is in to the classic reall american trucks

[choptop]

What parts are you looking for? I havent ever had trouble finding parts, but it has been a while since I searched for 1 ton parts. You have come to the right place tho.

[79K20]

Sounds like you're talking about the 14-bolt full-floater.

Drum brake kits can definitely be found for that at any Auto Zone, Checker, etc. Last time I did it I think I spent $80 for everything, including machining the drums. Make sure you tell them you have the full-floater axle, otherwise you will get parts for the wimpy semi-floating 14-bolt.

But, if you really want discs, you can convert it for around $400:
http://www.offroaddesign.com/catalog/14FFdisckit.htm
http://www.twiztedengineering.com/servlet/the-1/Conversion-Disc-Brake-Bracket/Detail

[79K20]

Oops. Just noticed you're talking about a Dually... I'm pretty sure the Disc brake conversion kit will NOT work on Duallies, only SRW trucks.

No big deal, the shoes/drums aren't that hard to work on.

[VileZambonie]

Getting every single part for your current set up should be no issue.

[hotrodhauler]

problem is my drums have been discontinued from oem i have looked everywhere i have a 11 in drum nothing     also the drums i do have can not be milled out any more if any one can find me a pari of these drums i would be so thank ful i need them badly and can not find them but it is the 14 bolt axle and i love it but i might have to dump it if i can find all my parts

[Captkaos]

K20's were never offered with Dual rear wheels.  If yours has dual rears, someone changed it.  K30's were the only trucks with Dual rear wheels.
GM discontinued several parts for our trucks, but any aftermarket parts store should have them or be able to get them.

If you have 11" drums, you don't have factory Dual rear wheels, they were 13" Drums.  Single rears were 11" Drums.  Which one do you have?
I just looked up both K20 and K30 Dooley drums on Napaonlne, both available.

[hotrodhauler]

i have a dually truck it has 11 in drums inside width   i know thi or a fact i have taken apart and looked at everything so being its what i have what can it be

[Blue 82]

do your drums look like this?

http://www.pavementsucks.com/showcase/jkwbrackets.php

[Blue 82]

or these?
http://newhaven.craigslist.org/pts/1108365618.html

[Captkaos]

To be a dually it would have a Dana 70 rear axle.  Take a picture of it and post it.

[hotrodhauler]

blue you my boy blue the first ones are my brakes help me what do i need how do i find parts man you are amazing thank you so much

[hotrodhauler]

i am starting to peice everything together here my fornt rims are not dually rims the truck is a k 20 i am thinking tat the people just put two dually rimed wheels on the back to make it a dually and its not supposed to be i am so confused on thi guys ill get pics on here soon so you let me know but is this all a possibility

[Blue 82]

Let's start with your VIN number
I don't need the last three digits (XXX) will be fine

the 4th letter designates your braking GVWR system

The reason for needing the VIN # is so you can
a) track down the parts you need to replace what you have (stock replacements)
b) to see what you have to start with, if you want to do a rear disc conversion

[hotrodhauler]

BD60724 (WAG)  Click Here for Part Image  Click Here for Activant’s Cover2Cover Image
Rear Brake Drum
OBSOLETE 11-5/32" X 2-3/4"
(84-86) 
see this is the part based on my vin but its obsolete and the one i seen the you have blue is similar and i am sure its the one and i know now you have to pull off the hub and that but i dont know if its even supposed to be a dually ill get pics tomorrow in the day light but i am confused because the cylinder that matches my vin doesnt match whats in the truck the wheel cylinder if you look at the 73brake cyl it does match with the bleeder on top so i dont know what to do can i just make a complete drum swap and take the backing plate off and change that too or what do i do , btw all the guys here on this site thank  you guys so much you have given me so much hope r this truck adn you have already helped so much thanks again guys