A/C Bracket question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

desertnick69 · 01-04-2013, 11:38 PM

I got a new harmonic balancer(see "Is this suppose to happen") now the pulleys line up. But the brackets don't look right. I have a 1971 C-20 with a 307, altis on the driver side, A/C is on the passenger side. The bracket on the intake manifold, is that all it does?

rsavage · 01-04-2013, 11:47 PM

It looks like you are missing a top bracket, the rear slide bracket is backwards, and the intake manifold bracket is different from the one on my 71 blazer (pictured) or my 70 K10.

chewychevy67 · 01-05-2013, 12:15 AM

It holds the smog pump if equipt with one

Andy4639 · 01-05-2013, 12:29 AM

Here is a set of brackets I took off my 71 307.

desertnick69 · 01-05-2013, 01:22 AM

So from what i see is the bracket on the intake manifold is wrong, it's to big and there should be a different bracket on the front of the A/C compressor?

Andy4639 is there any type of ajustment on the large bracket (the one on the right in your pic)? Thanks for the info guys.

**jocko** · 01-05-2013, 01:29 AM

is your truck a CA truck (i.e. originally licensed in CA when sold new, a Z code truck doesn't always mean a CA truck)? There are different brackets depending on whether or not it was originally a smog-pump equipped truck as chewy mentioned. If the smog pump is removed (thrown away usually

) then it looks like "something's missing"

I'm only kinda familiar with the big block smog pump setup - notsomuch the small block arrangement. So, it is possible - maybe someone with a small block with a smog pump can ID whether or not what you have is a smog pump bracket assembly.

Regardless, since the pump is gone, you probably need to punt and get the correct stuff as shown by rsavage and andy.

BTW, it looks like the bracket that your horizontal arrow is pointing to is installed backwards maybe (??) It is necessary - it supports the rear of the a/c compressor.

desertnick69 · 01-05-2013, 01:36 AM

No not CA truck as far as I know it is an AZ truck. I found this one in the back of someones 5 acres, he had bought it from a guy down the street. I thinks its a combination of 4 other owners ideas.

**jocko** · 01-05-2013, 01:43 AM

well then, probably best to find a new set o brackets - i think you're right, something looks kinda funky in there. Could perhaps be a transplanted CA motor - the thermo housing doesn't look very 67-72ish. Who knows!

Andy4639 · 01-05-2013, 02:12 AM

Quote:

Originally Posted by desertnick69

So from what i see is the bracket on the intake manifold is wrong, it's to big and there should be a different bracket on the front of the A/C compressor?

Andy4639 is there any type of ajustment on the large bracket (the one on the right in your pic)? Thanks for the info guys.

Yes you can adjust it the bolt slides through the bracket it self. The one that has the end cut off is a orignal bracket that I modified I now have another that isn't cut off.
This shows the same brackets as mine. U can see the adjustments.

01-04-2013, 11:38 PM	#1
desertnick69 Registered User Join Date: Jan 2012 Location: Phoenix, Arizona Posts: 500	A/C Bracket question I got a new harmonic balancer(see "Is this suppose to happen") now the pulleys line up. But the brackets don't look right. I have a 1971 C-20 with a 307, altis on the driver side, A/C is on the passenger side. The bracket on the intake manifold, is that all it does? Attached Images

01-04-2013, 11:47 PM	#2
rsavage Registered User Join Date: Aug 2009 Location: Alden NY Posts: 2,705	Re: A/C Bracket question It looks like you are missing a top bracket, the rear slide bracket is backwards, and the intake manifold bracket is different from the one on my 71 blazer (pictured) or my 70 K10. __________________ 1961 C1 Corvette 1959 El Camino 350 TPI, 9" 4 w disc 69 Blazer K5 - sold July '20 2021 Durango RT 5.7

01-05-2013, 12:15 AM	#3
chewychevy67 Registered User Join Date: Jan 2010 Location: Here Posts: 5,535	Re: A/C Bracket question It holds the smog pump if equipt with one

01-05-2013, 12:29 AM	#4
Andy4639 Old member Join Date: Jan 2002 Location: Liberty, & Garden City S.C. , U.S. Posts: 19,945	Re: A/C Bracket question Here is a set of brackets I took off my 71 307. __________________ 1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs.

01-05-2013, 01:22 AM	#5
desertnick69 Registered User Join Date: Jan 2012 Location: Phoenix, Arizona Posts: 500	Re: A/C Bracket question So from what i see is the bracket on the intake manifold is wrong, it's to big and there should be a different bracket on the front of the A/C compressor? Andy4639 is there any type of ajustment on the large bracket (the one on the right in your pic)? Thanks for the info guys. Last edited by desertnick69; 01-05-2013 at 01:23 AM. Reason: seperat lines

01-05-2013, 01:29 AM	#6
jocko Senior Member Join Date: Oct 2009 Location: Godley, TX Posts: 17,976	Re: A/C Bracket question is your truck a CA truck (i.e. originally licensed in CA when sold new, a Z code truck doesn't always mean a CA truck)? There are different brackets depending on whether or not it was originally a smog-pump equipped truck as chewy mentioned. If the smog pump is removed (thrown away usually ) then it looks like "something's missing" I'm only kinda familiar with the big block smog pump setup - notsomuch the small block arrangement. So, it is possible - maybe someone with a small block with a smog pump can ID whether or not what you have is a smog pump bracket assembly. Regardless, since the pump is gone, you probably need to punt and get the correct stuff as shown by rsavage and andy. BTW, it looks like the bracket that your horizontal arrow is pointing to is installed backwards maybe (??) It is necessary - it supports the rear of the a/c compressor.

01-05-2013, 01:36 AM	#7
desertnick69 Registered User Join Date: Jan 2012 Location: Phoenix, Arizona Posts: 500	Re: A/C Bracket question No not CA truck as far as I know it is an AZ truck. I found this one in the back of someones 5 acres, he had bought it from a guy down the street. I thinks its a combination of 4 other owners ideas.

01-05-2013, 01:43 AM	#8
jocko Senior Member Join Date: Oct 2009 Location: Godley, TX Posts: 17,976	Re: A/C Bracket question well then, probably best to find a new set o brackets - i think you're right, something looks kinda funky in there. Could perhaps be a transplanted CA motor - the thermo housing doesn't look very 67-72ish. Who knows!



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