Brake Swap Questions - The 1947 - Present Chevrolet & GMC Truck Message Board Network

mas09ts · 08-20-2009, 09:32 PM

Ok fellas i was thinking about swapping out my drums up front on my 70 GMC to discs. Ok now i've got parts off of a mid to late 70's chevy frame that I could use I think. Can I just swap the spindles and rotors and calipers and such? And as it sit the 70's frame up front is 5 lug and my truck is 6, so could I just swap the rotors to 6 lug and it bolt on to the 5 lug spindles and bolt right up to my truck. Thanks in advance guys......

mas09ts · 08-20-2009, 10:13 PM

anyone?

dmnall · 08-21-2009, 12:42 AM

Hey Mitch,
They will bolt up after you change the ball joints.. I think you will have to change the tie rod ends and possibly the pitman arm as well *but it has been a few years since I thought about this on my 68*. Then don't forget to change the proportioning valve as well. The one for the drum/drum will not work. Then since you have a 70 rear end, you can get axles for a 71 - 87 12 bolt axles and swap over to 5 lug in the rear as well..

The easiest way I recommend and I am going to do is just go get the front cradle from a 73 - 87 *front suspension disc to disc* and swap the front cradle, that way you get the newer motor mounts which is one of the plus sides..

HTH,
Charlie

08-20-2009, 09:32 PM	#1
mas09ts Registered User Join Date: Jul 2008 Location: Gate City VA Posts: 576	Brake Swap Questions Ok fellas i was thinking about swapping out my drums up front on my 70 GMC to discs. Ok now i've got parts off of a mid to late 70's chevy frame that I could use I think. Can I just swap the spindles and rotors and calipers and such? And as it sit the 70's frame up front is 5 lug and my truck is 6, so could I just swap the rotors to 6 lug and it bolt on to the 5 lug spindles and bolt right up to my truck. Thanks in advance guys...... __________________ Mitch 22yrs. Young 1970 GMC Short-Step 350/TH350 Combo. . . . Sold Dec 2011 Current Project 68 Gmc "Second Chance" Go to my 68 GMC Shorty Rebuild Thread http://67-72chevytrucks.com/vboard/s...39#post6341739

08-20-2009, 10:13 PM	#2
mas09ts Registered User Join Date: Jul 2008 Location: Gate City VA Posts: 576	Re: Brake Swap Questions anyone? __________________ Mitch 22yrs. Young 1970 GMC Short-Step 350/TH350 Combo. . . . Sold Dec 2011 Current Project 68 Gmc "Second Chance" Go to my 68 GMC Shorty Rebuild Thread http://67-72chevytrucks.com/vboard/s...39#post6341739

08-21-2009, 12:42 AM	#3
dmnall Registered User Join Date: Apr 2001 Location: Goleta, CA Posts: 505	Re: Brake Swap Questions Hey Mitch, They will bolt up after you change the ball joints.. I think you will have to change the tie rod ends and possibly the pitman arm as well but it has been a few years since I thought about this on my 68. Then don't forget to change the proportioning valve as well. The one for the drum/drum will not work. Then since you have a 70 rear end, you can get axles for a 71 - 87 12 bolt axles and swap over to 5 lug in the rear as well.. The easiest way I recommend and I am going to do is just go get the front cradle from a 73 - 87 front suspension disc to disc and swap the front cradle, that way you get the newer motor mounts which is one of the plus sides.. HTH, Charlie __________________ 1968 C10 Truck LWB Fleetside 1968 C10 Truck SWB Stepside 1994 K2500 Ext Cab Fleetside 2008 Honda Civic Si lease



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