what control arm bushings to use - The 1947 - Present Chevrolet & GMC Truck Message Board Network

GMC70c20 · 06-28-2007, 07:22 PM

I am going to convert my 3/4 ton truck to a 1/2. It is a 1970 c20, I robbed lower contol arms, spindle/hubs and drag link of a 81. The nuts that hold the contol arm bushing are different. Th old ones are really big and the new ones are a normal size with a washer behind them. My qeustion is can I use a 81 bushing in my upper 70 control arm?

dave2953 · 06-28-2007, 11:16 PM

I don't think the press-in bushings will work on the 70 arms, but I'm not 100%. Can you not get the UCA's from the 81?

ebright · 06-29-2007, 04:11 PM

I also have a 1970 c20 (3/4 ton) that I want to convert to a c10 (1/2)ton. can you give me some directions on what I need to do in the front? Also, what did you do about the rear axel?

**Captainfab** · 06-30-2007, 12:17 AM

The '70 control arms have the threaded steel bushings, and the '81 uses the pressed in rubber ones. I would just use the ones from the '81, or if they aren't available get some from about '76 and newer. Just my .02

06-28-2007, 07:22 PM	#1
GMC70c20 Registered User Join Date: Feb 2003 Location: Iowa Posts: 974	what control arm bushings to use I am going to convert my 3/4 ton truck to a 1/2. It is a 1970 c20, I robbed lower contol arms, spindle/hubs and drag link of a 81. The nuts that hold the contol arm bushing are different. Th old ones are really big and the new ones are a normal size with a washer behind them. My qeustion is can I use a 81 bushing in my upper 70 control arm? Last edited by GMC70c20; 06-28-2007 at 07:48 PM.

06-28-2007, 11:16 PM	#2
dave2953 Dave's not here, man Join Date: Jun 2004 Location: Winder, Georgia Posts: 2,000	Re: what control arm bushings to use I don't think the press-in bushings will work on the 70 arms, but I'm not 100%. Can you not get the UCA's from the 81? __________________ - 2014 VW Jetta - 2015 VW Jetta - 1966 Ford F-250

06-29-2007, 04:11 PM	#3
ebright Registered User Join Date: Jun 2007 Location: Prairieville, La. Posts: 3	Re: what control arm bushings to use I also have a 1970 c20 (3/4 ton) that I want to convert to a c10 (1/2)ton. can you give me some directions on what I need to do in the front? Also, what did you do about the rear axel?

06-30-2007, 12:17 AM	#4
Captainfab 60-66 Nut Join Date: Mar 2007 Location: Coeur d'Alene, Idaho Posts: 23,254	Re: what control arm bushings to use The '70 control arms have the threaded steel bushings, and the '81 uses the pressed in rubber ones. I would just use the ones from the '81, or if they aren't available get some from about '76 and newer. Just my .02 __________________ Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE



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