Need help on power disc conversion - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Jakes-66-K10 · 10-07-2005, 12:48 AM

Just when ya think you're almost done...

I've got my 1970 3/4 ton 2wd all converted over to discs. I took all the donor parts needed from a 1972 3/4 ton. Everything is in place, and I'm just buttoning it up, hooking up brake lines etc. However, I just ran into a little snag:

The brake hose that goes from the caliper to the crossmember and clips in does not fit. It looks like the 72 hoses are "keyed" with a hex nut, with a portion this rounded of instead of being 6 sided. It's not rounded of by a wrench, I checked both hoses and it sure looks keyed to fit a crossmember? My existing 70's crossmember mount for this rubber hose is keyed exactly like a 12 point socket...

Anyone familiar with this problem, or how to get around it? It was my understanding you didn't have to swap crossmembers. I'd hate to have to do that, if it comes to it I'll just dremel out the keyed section in the mount and make it fit.

Hope this makes sense, I'll try and get pics tomorrow if needed.

jlmtrout · 10-07-2005, 05:42 AM

I put 72 disc brakes on my 68 1/2 ton 2 wheel drive. It appears that your 3/4 ton uses the same hoses as my 1/2 ton. My mounting bracket for the hose has a round hole. The tip of the hose that connects to the hard line has a "hex" flange with a snap ring looking clip just above it. The end of the hose is round where the hard line connects. The round end goes through the bracket from the bottom, and the snap ring fits against the bottom of the bracket. There is another clip that goes on the top side of the bracket to hold it tight against the bracket. Hope this helps. Good luck and keep on truckin'......................Jerry

walker · 10-07-2005, 07:14 PM

I had to file mine out on my '67.

10-07-2005, 12:48 AM	#1
Jakes-66-K10 Registered User Join Date: Aug 2004 Location: Idaho Posts: 640	Need help on power disc conversion Just when ya think you're almost done... I've got my 1970 3/4 ton 2wd all converted over to discs. I took all the donor parts needed from a 1972 3/4 ton. Everything is in place, and I'm just buttoning it up, hooking up brake lines etc. However, I just ran into a little snag: The brake hose that goes from the caliper to the crossmember and clips in does not fit. It looks like the 72 hoses are "keyed" with a hex nut, with a portion this rounded of instead of being 6 sided. It's not rounded of by a wrench, I checked both hoses and it sure looks keyed to fit a crossmember? My existing 70's crossmember mount for this rubber hose is keyed exactly like a 12 point socket... Anyone familiar with this problem, or how to get around it? It was my understanding you didn't have to swap crossmembers. I'd hate to have to do that, if it comes to it I'll just dremel out the keyed section in the mount and make it fit. Hope this makes sense, I'll try and get pics tomorrow if needed.

10-07-2005, 05:42 AM	#2
jlmtrout Registered User Join Date: Jul 2002 Location: Memphis, Tn Posts: 194	I put 72 disc brakes on my 68 1/2 ton 2 wheel drive. It appears that your 3/4 ton uses the same hoses as my 1/2 ton. My mounting bracket for the hose has a round hole. The tip of the hose that connects to the hard line has a "hex" flange with a snap ring looking clip just above it. The end of the hose is round where the hard line connects. The round end goes through the bracket from the bottom, and the snap ring fits against the bottom of the bracket. There is another clip that goes on the top side of the bracket to hold it tight against the bracket. Hope this helps. Good luck and keep on truckin'......................Jerry __________________ '68 c-10 long wheelbase fleetside, been in family since new, originally 250 3 speed Now (389) 350 .060 over 3.75 stroke,Edelbrock Performer RPM 70cc heads and Intake 600 cfm Edelbrock,Small Comp Cams retro-roller cam and roller rockers,9:1 cr, headers, HEI,Old Air a/c, 72 power disc brakes w/stainless lines, 3.42 gear,T-56 6-speed, original paint(what's left of it). Dakota Digital Dash

10-07-2005, 07:14 PM	#3
walker Registered User Join Date: Jul 2003 Location: north of Phx AZ about 30 miles Posts: 698	I had to file mine out on my '67. __________________ Andy,Phx AZ '67 C-10 (Ahhh, done at last. Well there is that disk front end I want to put in and...) "23 C-Cab-sold '48 Ford 8N tractor(still working) '67 Scout(Now on the road) '70 MG B.-sold



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