Headers on an a/c truck? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

frost89434 · 07-31-2004, 08:21 PM

I have a 72 blazer that has a/c. I am wanting to put headers on it and was wondering how you made the bracket that bolted to the manifold work? I thought I would be able to just make a spacer to make up for the thickness of the manifold but it looks like the bracket will hit the tube. Any help would be great. Pic's would be even greater. Thanks JIM

neonlarry · 07-31-2004, 08:45 PM

I think most of the better header mfg's sell an A/C bracket to go with their headers.

ljbear · 07-31-2004, 09:27 PM

Jim,

I have mine blocked out 2" and the bracket has been modified to clear the tube on the header. Everything works great. I had to fab a new upper bracket that goes over the valve over, I'm using the tall valve covers and the stock bracket sat too low and wouldn't clear the cover.

Bamm · 07-31-2004, 10:31 PM

Hey Larry, what brand/kind of headers are you running? Do you have any side view where we can see more of the total picture? Thanks, ......Jerry

frost89434 · 07-31-2004, 10:40 PM

Larry,

Thanks a bunch. That is exactly what I was looking for. JIM

ljbear · 08-01-2004, 10:09 AM

Glad to help Jim. Jerry they are Dynomax 3/4 length for a Chevelle, fit great on these trucks.

Bamm · 08-01-2004, 11:52 AM

Thanks a bunch for that photo Larry. I have heard a lot about these headers fitting and giving us ground clearance on a lowered truck and its good to see an actual close up shot to see how nice they fit, Are there any clearance issues on the drivers side. Do you have any pics of that side? Thanks again, ........Jerry

ljbear · 08-01-2004, 01:58 PM

Jerry they fit good on both sides. The drivers side is slightly shorter and actually has better clearance. The passenger side collector is close to the floor but still clears without any problems. Keep in mind this is on a 4x4 with the motor in the rear location. If the motor was located forward there would be more room near the collector on the passenger side.

Bamm · 08-02-2004, 08:01 AM

Thanks again Larry, ...........Jerry

**lock** · 08-04-2004, 06:22 PM

Happen to have a p/n, price or info on where you bought them? Any idea what the exhaust inlet size is? Im looking for some for a LT1 which has the D shapped ports so I need D shaped headers or at least ones bigger.

ljbear · 08-04-2004, 11:52 PM

I got them through Summit Racing. Here's the link to the description, http://store.summitracing.com/defaul...&Ntt=wlk-86118 . Looks like 1 1/2" tubes to 2 1/2" collector.

ljbear · 08-05-2004, 12:51 AM

72Gord just brought something to my attention. These are probably not going to work to well on a truck with a clutch. The tubes and z-bar could be modified, but probably not the best choice.

07-31-2004, 08:21 PM	#1
frost89434 Registered User Join Date: Nov 2001 Location: sparks, NV Posts: 1,141	Headers on an a/c truck? I have a 72 blazer that has a/c. I am wanting to put headers on it and was wondering how you made the bracket that bolted to the manifold work? I thought I would be able to just make a spacer to make up for the thickness of the manifold but it looks like the bracket will hit the tube. Any help would be great. Pic's would be even greater. Thanks JIM __________________ 68 short fleet with 71 front clip 2wd jaguar blue 99 chevy ext cab shrtbed z71 loaded 99 chevy swb fleetside(daily driver) Sparks, Nevada

07-31-2004, 08:45 PM	#2
neonlarry Registered User Join Date: Feb 2002 Location: Vacaville, CA Posts: 2,746	I think most of the better header mfg's sell an A/C bracket to go with their headers. __________________ 70 C/10 Light Red 350/TH350, HEI, Duals w/40 series Flows, 91 seat, LED taillights 99 Pontiac S/C GTP, SLP Ram Air hood, GMPP Konis & springs 95 Neon ACR, MP PCM, AFX UDP, 3.0 CAI

07-31-2004, 09:27 PM	#3
ljbear Registered User Join Date: Jan 2003 Location: Emmett, Idaho Posts: 858	Jim, I have mine blocked out 2" and the bracket has been modified to clear the tube on the header. Everything works great. I had to fab a new upper bracket that goes over the valve over, I'm using the tall valve covers and the stock bracket sat too low and wouldn't clear the cover. Attached Images __________________ Larry 72 Chevy SWB 4x4 71 Chevy SWB 4x4 My Work Truck "Don't confuse enthusiasm with capability"

07-31-2004, 10:31 PM	#4
Bamm Cowboy Fan for Life!!!!!! Join Date: Apr 2002 Location: Amelia, Virginia Posts: 2,921	Hey Larry, what brand/kind of headers are you running? Do you have any side view where we can see more of the total picture? Thanks, ......Jerry __________________ 1967 ShortBed Fleetside 3/4 Drop 350/700R4 Tilt wheel 18 x 8 Torque Thrust II's Future mods: All new gauges & wood bed My Zip is 23002 I ship UPS, USPS

07-31-2004, 10:40 PM	#5
frost89434 Registered User Join Date: Nov 2001 Location: sparks, NV Posts: 1,141	Larry, Thanks a bunch. That is exactly what I was looking for. JIM __________________ 68 short fleet with 71 front clip 2wd jaguar blue 99 chevy ext cab shrtbed z71 loaded 99 chevy swb fleetside(daily driver) Sparks, Nevada

08-01-2004, 10:09 AM	#6
ljbear Registered User Join Date: Jan 2003 Location: Emmett, Idaho Posts: 858	Glad to help Jim. Jerry they are Dynomax 3/4 length for a Chevelle, fit great on these trucks. Attached Images __________________ Larry 72 Chevy SWB 4x4 71 Chevy SWB 4x4 My Work Truck "Don't confuse enthusiasm with capability"

08-01-2004, 11:52 AM	#7
Bamm Cowboy Fan for Life!!!!!! Join Date: Apr 2002 Location: Amelia, Virginia Posts: 2,921	Thanks a bunch for that photo Larry. I have heard a lot about these headers fitting and giving us ground clearance on a lowered truck and its good to see an actual close up shot to see how nice they fit, Are there any clearance issues on the drivers side. Do you have any pics of that side? Thanks again, ........Jerry __________________ 1967 ShortBed Fleetside 3/4 Drop 350/700R4 Tilt wheel 18 x 8 Torque Thrust II's Future mods: All new gauges & wood bed My Zip is 23002 I ship UPS, USPS

08-01-2004, 01:58 PM	#8
ljbear Registered User Join Date: Jan 2003 Location: Emmett, Idaho Posts: 858	Jerry they fit good on both sides. The drivers side is slightly shorter and actually has better clearance. The passenger side collector is close to the floor but still clears without any problems. Keep in mind this is on a 4x4 with the motor in the rear location. If the motor was located forward there would be more room near the collector on the passenger side. Attached Images __________________ Larry 72 Chevy SWB 4x4 71 Chevy SWB 4x4 My Work Truck "Don't confuse enthusiasm with capability"

08-02-2004, 08:01 AM	#9
Bamm Cowboy Fan for Life!!!!!! Join Date: Apr 2002 Location: Amelia, Virginia Posts: 2,921	Thanks again Larry, ...........Jerry __________________ 1967 ShortBed Fleetside 3/4 Drop 350/700R4 Tilt wheel 18 x 8 Torque Thrust II's Future mods: All new gauges & wood bed My Zip is 23002 I ship UPS, USPS

08-04-2004, 06:22 PM	#10
lock Insert funny comment. Join Date: Dec 1999 Location: Concord NC Posts: 621	Happen to have a p/n, price or info on where you bought them? Any idea what the exhaust inlet size is? Im looking for some for a LT1 which has the D shapped ports so I need D shaped headers or at least ones bigger. __________________ ------------ - Mark -My Build Thread... -68 C10, LT1 - Undergoing Frame off resto -86 IROC-Z T72 turbo 355, M6 -70 Camaro http://www.iroc-ss.com

08-04-2004, 11:52 PM	#11
ljbear Registered User Join Date: Jan 2003 Location: Emmett, Idaho Posts: 858	I got them through Summit Racing. Here's the link to the description, http://store.summitracing.com/defaul...&Ntt=wlk-86118 . Looks like 1 1/2" tubes to 2 1/2" collector. __________________ Larry 72 Chevy SWB 4x4 71 Chevy SWB 4x4 My Work Truck "Don't confuse enthusiasm with capability"

08-05-2004, 12:51 AM	#12
ljbear Registered User Join Date: Jan 2003 Location: Emmett, Idaho Posts: 858	72Gord just brought something to my attention. These are probably not going to work to well on a truck with a clutch. The tubes and z-bar could be modified, but probably not the best choice. __________________ Larry 72 Chevy SWB 4x4 71 Chevy SWB 4x4 My Work Truck "Don't confuse enthusiasm with capability"



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