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Old 09-11-2010, 02:23 PM   #1
HarrisonTX
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'69 C20 Front Drum to Disc help

From what I've been reading, your 1/2 guys have it pretty easy when it comes to swapping from drums to discs up front.

Are there any easy options for a drum to disc swap on a 1969 3/4 "Custom/Camper"?
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Old 09-11-2010, 03:37 PM   #2
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Re: '69 C20 Front Drum to Disc help

Easiest would be to get stuff off of a '71-'72 C-20. Spindles, rotors, calipers, drag link, inner and outer tierods, ball joints as well as master cylinder and prop valve. Still trying to figure out brake hoses/lines on this swap. I think I remember hearing '73 C-20 brake hoses might work with the '69 hardlines. There are some members that have done this swap, maybe they'll chime in.
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Old 09-11-2010, 04:10 PM   #3
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Re: '69 C20 Front Drum to Disc help

Awesome. Didnt expect it to be that simple. I've looked into it before, and was discouraged.

Seems like everything is a bolt on?
You can always get the brake lines made.
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Old 09-11-2010, 04:28 PM   #4
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Re: '69 C20 Front Drum to Disc help

Everything's bolt in from what I've been told. I have most of the parts to do it, but I just recently rebuilt everything on my drum brakes, so this project is going to have to wait.
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Old 09-11-2010, 04:29 PM   #5
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Re: '69 C20 Front Drum to Disc help

You can also use the 73-87 disc setups like lots of the 1/2 ton guys do just get it from a 3/4 ton if you look around there is lots of info on it all pretty simple unbolting and bolting
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Old 09-11-2010, 05:19 PM   #6
Mike C
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Re: '69 C20 Front Drum to Disc help

Not sure exactly what my components were from, but I bought a 70 3/4 ton that already had a disc swap done and swapped it onto my 70 GMC. I bought new steel lines and ran them from the master cylinder. I used the drum booster with a new disc master. I cut the tabs that hold the rubber lines where the steel ones attach and re-welded them to the crossmember. Best mod ever!
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Old 09-12-2010, 12:31 AM   #7
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Re: '69 C20 Front Drum to Disc help

Use 73-87 3/4 ton stuff. It will swap over to your existing a-arms using the 73-87 BJ's.
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Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive.
It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar.....

Cubic inches is like Indiana Jones with a cheap pistol.
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Old 09-12-2010, 02:29 PM   #8
HarrisonTX
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Re: '69 C20 Front Drum to Disc help

Quote:
Originally Posted by SCOTI View Post
Use 73-87 3/4 ton stuff. It will swap over to your existing a-arms using the 73-87 BJ's.
Seems like the simplest idea so far.
So, from the Donor truck, I would need: Calipers, discs and spindles?
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Old 09-12-2010, 07:09 PM   #9
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Re: '69 C20 Front Drum to Disc help

The guy that did mine just swaped out the whole crossmember and everything from a earlys 70s truck.
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Old 09-12-2010, 10:32 PM   #10
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Re: '69 C20 Front Drum to Disc help

Quote:
Originally Posted by HarrisonTX View Post
Seems like the simplest idea so far.
So, from the Donor truck, I would need: Calipers, discs and spindles?
Get everything between the spindle steering arms as well. Use the 73-up tie-rods & draglink for simplicity.
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Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive.
It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar.....

Cubic inches is like Indiana Jones with a cheap pistol.
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Old 11-03-2010, 12:25 AM   #11
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Re: '69 C20 Front Drum to Disc help

Here is the thread I was looking for.

Question:
is it better to just swap crossmember and all?
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