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

76PasoGMC · 04-29-2008, 03:01 AM

Ok IM sure this is an easy question. I have the ac system off a 454 76 chevy truck. I want to put it on my 76 GMC 350 truck, I am swapping cabs.

What new AC brackets do I need. I have the complete set for the 454 (still bolted on the 454) Are the ones March and Summit worth it? I just want stock brackets.

Thanks for everyones help.

Tony

87Lowrider · 04-29-2008, 03:10 AM

It depends on your budget whether they're worth it.

I am finishing up a 350 - 454 conversion on my '87 now. The 454 came from a '76 3/4 ton lwb.

I still have the original bracketry from the 454, but when you install headers, that changes everything on the driver side of the engine with regards to A/C and PS mounting.

To fix this, I used the ULTRA Serpentine system from March with he Alternator / AC bracket in one. You can see it below.

I don't have the A/C compressor they recommend yet but will soon. All three pieces (PS, ALT, A/C) are available from March too, either chromed or billet.

Kenny

76PasoGMC · 04-29-2008, 03:55 AM

so since my engine (350) has headers u think I will have proiblems mounting the ac from the 454 (exhaust maifolds). I have all the 454 brackets but dont I need different ones for the 350??

87Lowrider · 04-29-2008, 04:10 AM

possibly, look at the picture below. It's off the '76 3/4 ton that I pulled the 454 from. Look just above spark plugs 1 and 3. Theres a bracket on the head that is critical to the mounting of the AC. If your 350 head has the holes for that bracket, you may be ok.

Seems to me that the bolt pattern on the front and rear of the heads are not the same as a small block too. Once you mock it up, you'll know for sure if the brackets will line up. My thought is they won't.

Ofcourse, the March system relocates the AC to the passenger side bottom and requires a different compressor.

76PasoGMC · 04-29-2008, 04:27 AM

Ok thanks.

I will look later. I think I may go to a junk yard and find a truck with ac and a 350 and scavenge what I need

87Lowrider · 04-29-2008, 04:30 AM

Good luck!

76PasoGMC · 04-29-2008, 04:44 AM

Im sure I'll need it. Im sure this isnt the first time someone has done this with a cab swap

8T3GMC · 04-29-2008, 06:16 AM

since we are on the subject, What kind of a A/C bracket would I need when I put headers on my engine. I am also running all original brackets.

884x4Sub · 04-29-2008, 05:32 PM

check ebay.......there was a guy about 6 mos ago who seemed to specialise in that stuff from parted out trucks

04-29-2008, 03:01 AM	#1
76PasoGMC Registered User Join Date: Mar 2008 Location: Paso Robles, CA Posts: 43	A/C Bracket Question Ok IM sure this is an easy question. I have the ac system off a 454 76 chevy truck. I want to put it on my 76 GMC 350 truck, I am swapping cabs. What new AC brackets do I need. I have the complete set for the 454 (still bolted on the 454) Are the ones March and Summit worth it? I just want stock brackets. Thanks for everyones help. Tony

04-29-2008, 03:10 AM	#2
87Lowrider Navy Radioman Veteran Join Date: Jul 2007 Location: Western Kentucky Posts: 1,356	Re: A/C Bracket Question It depends on your budget whether they're worth it. I am finishing up a 350 - 454 conversion on my '87 now. The 454 came from a '76 3/4 ton lwb. I still have the original bracketry from the 454, but when you install headers, that changes everything on the driver side of the engine with regards to A/C and PS mounting. To fix this, I used the ULTRA Serpentine system from March with he Alternator / AC bracket in one. You can see it below. I don't have the A/C compressor they recommend yet but will soon. All three pieces (PS, ALT, A/C) are available from March too, either chromed or billet. Kenny __________________ 1987 Chevrolet R10 Silverado BBC Build thread - SOLD 1986 GMC Sierra Classic - SOLD 1957 Chevy Step Side Daily Driver; 2005 Chevrolet Silverado 4x4 Z71 Stepside - SOLD 2005 Chevrolet Tahoe Z71

04-29-2008, 03:55 AM	#3
76PasoGMC Registered User Join Date: Mar 2008 Location: Paso Robles, CA Posts: 43	Re: A/C Bracket Question so since my engine (350) has headers u think I will have proiblems mounting the ac from the 454 (exhaust maifolds). I have all the 454 brackets but dont I need different ones for the 350??

04-29-2008, 04:10 AM	#4
87Lowrider Navy Radioman Veteran Join Date: Jul 2007 Location: Western Kentucky Posts: 1,356	Re: A/C Bracket Question possibly, look at the picture below. It's off the '76 3/4 ton that I pulled the 454 from. Look just above spark plugs 1 and 3. Theres a bracket on the head that is critical to the mounting of the AC. If your 350 head has the holes for that bracket, you may be ok. Seems to me that the bolt pattern on the front and rear of the heads are not the same as a small block too. Once you mock it up, you'll know for sure if the brackets will line up. My thought is they won't. Ofcourse, the March system relocates the AC to the passenger side bottom and requires a different compressor. __________________ 1987 Chevrolet R10 Silverado BBC Build thread - SOLD 1986 GMC Sierra Classic - SOLD 1957 Chevy Step Side Daily Driver; 2005 Chevrolet Silverado 4x4 Z71 Stepside - SOLD 2005 Chevrolet Tahoe Z71

04-29-2008, 04:27 AM	#5
76PasoGMC Registered User Join Date: Mar 2008 Location: Paso Robles, CA Posts: 43	Re: A/C Bracket Question Ok thanks. I will look later. I think I may go to a junk yard and find a truck with ac and a 350 and scavenge what I need

04-29-2008, 04:30 AM	#6
87Lowrider Navy Radioman Veteran Join Date: Jul 2007 Location: Western Kentucky Posts: 1,356	Re: A/C Bracket Question Good luck! __________________ 1987 Chevrolet R10 Silverado BBC Build thread - SOLD 1986 GMC Sierra Classic - SOLD 1957 Chevy Step Side Daily Driver; 2005 Chevrolet Silverado 4x4 Z71 Stepside - SOLD 2005 Chevrolet Tahoe Z71

04-29-2008, 04:44 AM	#7
76PasoGMC Registered User Join Date: Mar 2008 Location: Paso Robles, CA Posts: 43	Re: A/C Bracket Question Im sure I'll need it. Im sure this isnt the first time someone has done this with a cab swap

04-29-2008, 06:16 AM	#8
8T3GMC Registered User Join Date: Dec 2007 Location: Sevierville,TN Posts: 138	Re: A/C Bracket Question since we are on the subject, What kind of a A/C bracket would I need when I put headers on my engine. I am also running all original brackets. __________________ For God so loved the world that He gave His one and only Son to who ever believed shall not perish but have eternal life. Red 8T3 10/2/10 2/29/12 Gracie-Jo PAK-MAN.

04-29-2008, 05:32 PM	#9
884x4Sub p p pullin' Join Date: Apr 2008 Location: oshawa ontario Posts: 373	Re: A/C Bracket Question check ebay.......there was a guy about 6 mos ago who seemed to specialise in that stuff from parted out trucks



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