Disk Brake conversion questions - The 1947 - Present Chevrolet & GMC Truck Message Board Network

68jimmy · 06-03-2005, 04:19 PM

I really like the idea of using newer model components as they are a bit cheaper and more readily available and I want to have 6 lugs rotors. As such I have been doing quite a bit of reading through his forum and the FAQ concerning a drum to disk conversion. http://www.67-72chevytrucks.com/vboa...d.php3?t=35042

One which was mentioned in the FAQ was done by using a 1/2 ton upper A-arm with a 3/4 ton lower and all other other components from a 1990 1/2 ton (ball joints, 3/4 ton spindle, tie rods, etc).

I have a 1968 GMC 2500 that I have basically converted to a 1/2 ton with the exception of the front suspension and drum brakes. As I am going to be rummaging around the yards this weekend I was wondering, can I use my existing upper and lower arms (3/4 ton) then use all of the remaining components from say an 88 to 91 1/2 ton? I plan on using the spindles that support the 1.25 inch 6 lug rotors... Or is the upper 3/4 arm to large/offset to use in this configuration?

68jimmy · 06-06-2005, 11:35 AM

Ttt

FirstGen · 06-06-2005, 12:04 PM

You will need a 1/2 ton upper a-arm because the newer model spindle is offset.
Good luck.
-Taylor

68jimmy · 06-07-2005, 06:29 AM

FirstGen,

Thanks. that's what I needed to know...

FirstGen · 06-07-2005, 10:10 AM

no prob.

06-03-2005, 04:19 PM	#1
68jimmy Registered User Join Date: Dec 2003 Location: albuquerque Posts: 431	Disk Brake conversion questions I really like the idea of using newer model components as they are a bit cheaper and more readily available and I want to have 6 lugs rotors. As such I have been doing quite a bit of reading through his forum and the FAQ concerning a drum to disk conversion. http://www.67-72chevytrucks.com/vboa...d.php3?t=35042 One which was mentioned in the FAQ was done by using a 1/2 ton upper A-arm with a 3/4 ton lower and all other other components from a 1990 1/2 ton (ball joints, 3/4 ton spindle, tie rods, etc). I have a 1968 GMC 2500 that I have basically converted to a 1/2 ton with the exception of the front suspension and drum brakes. As I am going to be rummaging around the yards this weekend I was wondering, can I use my existing upper and lower arms (3/4 ton) then use all of the remaining components from say an 88 to 91 1/2 ton? I plan on using the spindles that support the 1.25 inch 6 lug rotors... Or is the upper 3/4 arm to large/offset to use in this configuration? __________________ 78 C10 LWB Super Cheyenne

06-06-2005, 11:35 AM	#2
68jimmy Registered User Join Date: Dec 2003 Location: albuquerque Posts: 431	Ttt __________________ 78 C10 LWB Super Cheyenne

06-06-2005, 12:04 PM	#3
FirstGen Just Don't Stop! Join Date: Feb 2004 Location: Dallas Posts: 1,239	You will need a 1/2 ton upper a-arm because the newer model spindle is offset. Good luck. -Taylor __________________ 1968 C10 build in process TT LSA/6L90e/9"

06-07-2005, 06:29 AM	#4
68jimmy Registered User Join Date: Dec 2003 Location: albuquerque Posts: 431	FirstGen, Thanks. that's what I needed to know... __________________ 78 C10 LWB Super Cheyenne

06-07-2005, 10:10 AM	#5
FirstGen Just Don't Stop! Join Date: Feb 2004 Location: Dallas Posts: 1,239	no prob. __________________ 1968 C10 build in process TT LSA/6L90e/9"

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