68 C20 4 wheel disc options - The 1947 - Present Chevrolet & GMC Truck Message Board Network

littlehopper · 07-11-2020, 10:55 AM

Changing to disc and have looked at the faq sticky for fronts. From that it looks like I can swap the complete cross member from a 73-87 truck or just the knuckles and ball joints.
Wondering if anyone has done rear disc and if they used these?
https://lugnut4x4.com/product/68-72-...onversion-kit/

Thanks, Joe

mr48chev · 07-11-2020, 11:35 AM

71/72 3/4 ton have front disk brakes. You are going to need the A frames or whole crossmember as the ball joints are different between the early trucks and 71 and up.

Any are going to set the wheels out a bit from the 68 drum brake tread width.

The only rub I see on that rear brake kit is that it doesn't have any provisions for park/emergency brake. Most guys use a Cadillac Eldorado rear caliper set and they are a bit spendy. I bought the caliper brackets off Ebay and rotors but haven't got the calipers yet for my 71 GMC 3/4 ton. Work on that truck is stalled out a bit while I get work done on other projects.

07-11-2020, 10:55 AM	#1
littlehopper Registered User Join Date: Mar 2017 Location: Port Murray, NJ Posts: 147	68 C20 4 wheel disc options Changing to disc and have looked at the faq sticky for fronts. From that it looks like I can swap the complete cross member from a 73-87 truck or just the knuckles and ball joints. Wondering if anyone has done rear disc and if they used these? https://lugnut4x4.com/product/68-72-...onversion-kit/ Thanks, Joe

07-11-2020, 11:35 AM	#2
mr48chev Registered User Join Date: Jul 2007 Location: Toppenish, WA Posts: 15,307	Re: 68 C20 4 wheel disc options 71/72 3/4 ton have front disk brakes. You are going to need the A frames or whole crossmember as the ball joints are different between the early trucks and 71 and up. Any are going to set the wheels out a bit from the 68 drum brake tread width. The only rub I see on that rear brake kit is that it doesn't have any provisions for park/emergency brake. Most guys use a Cadillac Eldorado rear caliper set and they are a bit spendy. I bought the caliper brackets off Ebay and rotors but haven't got the calipers yet for my 71 GMC 3/4 ton. Work on that truck is stalled out a bit while I get work done on other projects. __________________ Founding member of the too many projects, too little time and money club. My ongoing truck projects: 48 Chev 3100 that will run a 292 Six. 71 GMC 2500 that is getting a Cad 500 transplant. 77 C 30 dualie, 454, 4 speed with a 10 foot flatbed and hoist. It does the heavy work and hauls the projects around.



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.