C20 Control arm differences - The 1947 - Present Chevrolet & GMC Truck Message Board Network

rpmerf · 06-22-2018, 09:05 AM

Can I bolt 73-87 C20 upper and lower control arms to my 1970 C20 cradle without drilling? If so, will the geometry be the same? Can I still use my 1970 springs?

Background:
I have a 1970 C20. I bought a 1983 C20 to sacrifice for my disc brake swap. The 83 comes with a new in box set of upper control arms with shafts and ball joints installed. I'm wondering if I can get a set of lowers and use them for the swap. I'd rather not swap the cradle. If swapping control arms doesn't work, I plan to install the 73-87 ball joints in my 1970 control arms.

06-22-2018, 09:05 AM	#1
rpmerf Registered User Join Date: Feb 2011 Location: Parkville, MD Posts: 1,024	C20 Control arm differences Can I bolt 73-87 C20 upper and lower control arms to my 1970 C20 cradle without drilling? If so, will the geometry be the same? Can I still use my 1970 springs? Background: I have a 1970 C20. I bought a 1983 C20 to sacrifice for my disc brake swap. The 83 comes with a new in box set of upper control arms with shafts and ball joints installed. I'm wondering if I can get a set of lowers and use them for the swap. I'd rather not swap the cradle. If swapping control arms doesn't work, I plan to install the 73-87 ball joints in my 1970 control arms. __________________ 1970 C20 Custom Camper - 350, TH350 1997 GMC Suburban 1994 Acura Integra GSR 1987 Dodge Daytona Shelby Z



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