Which arms should I use? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Jakes-66-K10 · 08-23-2005, 12:19 PM

I'm close to having all the parts I need to do a disc conversion on my 1970 CST/20. I have all the donor parts from a 1972 3/4 ton truck. My plan was to install the rotors, calipers, spindles, arms - and everything over to the '70.

I have 4 new 72 balljoints ready to be pressed into the arms. But now that it's come time for this, I'm wondering which arms to press them into? The arms from the '72 are very crusty looking - they'll work, but they scaling off with rust all over them. I think they need new bushings too. The arms currently on my '70 are in great shape, and haven't seen the weather the 72 arms have.

Am I going to create problems by installing the '72 balljoints into the '70 arms? Seems like I heard once that steering radius is reduced... is this correct?

Jakes-66-K10 · 08-23-2005, 07:32 PM

Bump, anyone know if '72 balljoints and disc components will work OK with '70 arms?

*FormerMember* · 08-23-2005, 07:44 PM

Quote:

Originally Posted by vortexofpain

Bump, anyone know if '72 balljoints and disc components will work OK with '70 arms?

I used 72 C30 balljoints and disks on my 70 C20.

Not sure if that helps?

69 longhorn · 08-23-2005, 08:00 PM

The 72 baljoints will fit in your 70 arms. The only issue that you may find is a shorter turning radius. You can grind the stops on the spindles to take care of that. best of luck,crazyL

08-23-2005, 12:19 PM	#1
Jakes-66-K10 Registered User Join Date: Aug 2004 Location: Idaho Posts: 640	Which arms should I use? I'm close to having all the parts I need to do a disc conversion on my 1970 CST/20. I have all the donor parts from a 1972 3/4 ton truck. My plan was to install the rotors, calipers, spindles, arms - and everything over to the '70. I have 4 new 72 balljoints ready to be pressed into the arms. But now that it's come time for this, I'm wondering which arms to press them into? The arms from the '72 are very crusty looking - they'll work, but they scaling off with rust all over them. I think they need new bushings too. The arms currently on my '70 are in great shape, and haven't seen the weather the 72 arms have. Am I going to create problems by installing the '72 balljoints into the '70 arms? Seems like I heard once that steering radius is reduced... is this correct?

08-23-2005, 08:00 PM	#4
69 longhorn Registered User Join Date: Aug 2001 Location: rock island,il,usa Posts: 5,382	The 72 baljoints will fit in your 70 arms. The only issue that you may find is a shorter turning radius. You can grind the stops on the spindles to take care of that. best of luck,crazyL __________________ http://community.webshots.com/user/hotrodhorn

08-23-2005, 07:32 PM	#2
Jakes-66-K10 Registered User Join Date: Aug 2004 Location: Idaho Posts: 640	Bump, anyone know if '72 balljoints and disc components will work OK with '70 arms?



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