70 c20 disc brake conversion - The 1947 - Present Chevrolet & GMC Truck Message Board Network

rpmerf · 08-14-2011, 10:02 PM

1970 c20 custom camper 2WD 8 lug eaton rear

I saw some disc brake conversion info on here, but I'm having a hard time finding specific details.

It seems the 71+ trucks got the disc brakes up front. So I guess a 71 - ??? would be needed for the swap? Would I be able to just grab the spindle, rotor, caliper/brackets, master cylinder etc. or would I need the entire crossmember? It looks like 71-72 I can grab the few parts and can swap crossmembers up to 87?

I see the disc brake conversion for the rear here http://www.blackbirdscustomtrucks.co...x7.html#5eaton is there any stock application I can grab this from? If the rear can't be converted cheaply, its unlikely I'll even bother.

ed2552 · 08-14-2011, 10:12 PM

I think if you upgraded to discs in the front that would be plenty, unless you're doing a ton of heavy towing. I think you can use 71-72 parts if you grab the knuckle and all associated brake pieces, and I'd recommend a new MC for a 71 or 72. If you get 73+ you'll have to change your ball-joints and tie-rod ends, or you can grab the whole steering linkage, etc.

rpmerf · 08-14-2011, 10:21 PM

sounds good.

BTW this truck is more of a daily driver type vehicle than anything. I may get a car trailer for it in the future, but it won't be a common thing.

It looks almost like converting to rear discs is cheap in the long run, as it uses more common off the shelf parts than the standard eaton drums.

ed2552 · 08-15-2011, 01:55 AM

Yeah, but long-run how many more miles do you plan on putting on this truck? I'm at 77k on the original rear drums and they seem to be doing fine yet, lol.

**leddzepp** · 08-15-2011, 02:20 AM

grab the whole x member from a 71-72 C-20, direct bolt in. if you are just grabbing the parts you listed, you need the 71-72 centerlink as well so the inner tie rods match up.
Posted via Mobile Device

rpmerf · 08-15-2011, 07:23 PM

Quote:

Originally Posted by ed2552

Yeah, but long-run how many more miles do you plan on putting on this truck? I'm at 77k on the original rear drums and they seem to be doing fine yet, lol.

not a lot. Probably the next time I do the rear brakes will be the last time lol. I have no idea how they look right now, but the truck has about 375,000 miles on it.

08-14-2011, 10:02 PM	#1
rpmerf Registered User Join Date: Feb 2011 Location: Parkville, MD Posts: 1,024	70 c20 disc brake conversion 1970 c20 custom camper 2WD 8 lug eaton rear I saw some disc brake conversion info on here, but I'm having a hard time finding specific details. It seems the 71+ trucks got the disc brakes up front. So I guess a 71 - ??? would be needed for the swap? Would I be able to just grab the spindle, rotor, caliper/brackets, master cylinder etc. or would I need the entire crossmember? It looks like 71-72 I can grab the few parts and can swap crossmembers up to 87? I see the disc brake conversion for the rear here http://www.blackbirdscustomtrucks.co...x7.html#5eaton is there any stock application I can grab this from? If the rear can't be converted cheaply, its unlikely I'll even bother. __________________ 1970 C20 Custom Camper - 350, TH350 1997 GMC Suburban 1994 Acura Integra GSR 1987 Dodge Daytona Shelby Z

08-14-2011, 10:12 PM	#2
ed2552 Registered User Join Date: Jan 2007 Location: Charles City IA Posts: 1,626	Re: 70 c20 disc brake conversion I think if you upgraded to discs in the front that would be plenty, unless you're doing a ton of heavy towing. I think you can use 71-72 parts if you grab the knuckle and all associated brake pieces, and I'd recommend a new MC for a 71 or 72. If you get 73+ you'll have to change your ball-joints and tie-rod ends, or you can grab the whole steering linkage, etc. __________________ '67 C20, Under the Knife!, LWB, Eaton HO-52, Rear Coil Springs 72' GMC C2500, 350, TH400(?), Dana 60 '67 K10 4-spd., 305, SM465, Dana 44, 12 Bolt, RUST! '65 C60 292, 4 spd, 2 spd Rearend, 15' Grain Box, MINT! 09 Yukon Denali 82k Miles 6.2L/6A

08-14-2011, 10:21 PM	#3
rpmerf Registered User Join Date: Feb 2011 Location: Parkville, MD Posts: 1,024	Re: 70 c20 disc brake conversion sounds good. BTW this truck is more of a daily driver type vehicle than anything. I may get a car trailer for it in the future, but it won't be a common thing. It looks almost like converting to rear discs is cheap in the long run, as it uses more common off the shelf parts than the standard eaton drums. __________________ 1970 C20 Custom Camper - 350, TH350 1997 GMC Suburban 1994 Acura Integra GSR 1987 Dodge Daytona Shelby Z

08-15-2011, 01:55 AM	#4
ed2552 Registered User Join Date: Jan 2007 Location: Charles City IA Posts: 1,626	Re: 70 c20 disc brake conversion Yeah, but long-run how many more miles do you plan on putting on this truck? I'm at 77k on the original rear drums and they seem to be doing fine yet, lol. __________________ '67 C20, Under the Knife!, LWB, Eaton HO-52, Rear Coil Springs 72' GMC C2500, 350, TH400(?), Dana 60 '67 K10 4-spd., 305, SM465, Dana 44, 12 Bolt, RUST! '65 C60 292, 4 spd, 2 spd Rearend, 15' Grain Box, MINT! 09 Yukon Denali 82k Miles 6.2L/6A

08-15-2011, 02:20 AM	#5
leddzepp Moderator Join Date: May 2007 Location: Southern Cal Posts: 19,995	Re: 70 c20 disc brake conversion grab the whole x member from a 71-72 C-20, direct bolt in. if you are just grabbing the parts you listed, you need the 71-72 centerlink as well so the inner tie rods match up. Posted via Mobile Device __________________ 1972 C/10 Cheyenne Super SWB. Restored, loaded, slammed. 1968 C/10 50th Anniversary LWB. Unrestored, stock, daily driver/work truck. RIP ElJay RIP 67ChevyRedneck RIP Grumpy Old Man



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