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Old 07-08-2018, 09:30 AM   #1
jondancer
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Upper A-Arm compatibility?

So my upper a-arm bushings are squeaking and I don’t want to deal with replacing the bushings . I’d rather replace the whole a-arm. I can’t fnd 67-72 stock type arms, but could I use 73+ ?
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Old 07-08-2018, 04:32 PM   #2
toolboxchev
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Re: Upper A-Arm compatibility?

From what I understand you have to change the front complete under carriage assembly to get the updated rubber bushings in the front end.

The 67-72 all used metal bushings in the upper and lower A-arms, Get a front from a 73-87 and rebuild it.

Unless someone knows of a supplier of control arm shafts that are upgraded to the rubber bushing type? Most aftermarket stock style is all steel for 67-72.
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Old 07-08-2018, 04:40 PM   #3
jondancer
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Re: Upper A-Arm compatibility?

I was hoping to just bolt a 73-87 upper arm on
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Old 07-08-2018, 09:10 PM   #4
AussieinNC
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Re: Upper A-Arm compatibility?

Both early metal style and later rubber style arms use the same bolt spacing where they bolt on to the cross member...

I usually grab the entire cross member from a later truck, rebuild it on the bench jig then install it into the early frame.

Hope this helps...


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Old 07-08-2018, 09:53 PM   #5
jondancer
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Re: Upper A-Arm compatibility?

So will the 73+ upper arm just bolt on to my stock setup?
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Old 07-09-2018, 12:38 AM   #6
Trackbar
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Re: Upper A-Arm compatibility?

I used my factory 70 C-10 crossmember and used 82 control arms, upper and lower with no mounting issues. JUST be sure you get all the upper mounting washers with newer arms.
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Old 07-09-2018, 09:44 AM   #7
raggedjim
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Re: Upper A-Arm compatibility?

They will work if you use the correct balljoint for the spindle you are using.

Rg
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