67 GMC-Factory Exhaust Hanger Brackets? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

67JimmyMO · 09-01-2014, 07:35 PM

My 67 GMC SWB has 3 brackets with a hole (pictured below) attached in various spots down the drivers side frame rail.

They are all riveted to the frame so I assume they are OEM.

I am converting to V8 and building my own exhaust (Heartbeat 2 1/4" w/Flowmaster clone muffs) and was wondering if trucks with duals from the factory had the same pieces running down the passengers frame rail?

If so, do any of the truck parters ever cut those off and sell them?

Thanks

airdale94 · 09-02-2014, 04:55 PM

I don't think any trucks came with factory duals.

davepl · 09-02-2014, 05:47 PM

My 402 truck has them on both sides. Factory rivets. No idea if it had duals from the factory (not on the SPID). I've been told in other threads that some trucks had dual exhaust though. Maybe it was only big blocks or something.

In a tangential note the base 427 available in the '69 Impala SS was a single 1.5" pipe. Ouch.

67JimmyMO · 09-02-2014, 06:56 PM

Quote:

Originally Posted by airdale94

I don't think any trucks came with factory duals.

I wondered about that.

Seems like there is a SPID pic thread here somewhere, I will try to look through it if I can locate it.

67JimmyMO · 09-02-2014, 06:59 PM

Quote:

Originally Posted by davepl

My 402 truck has them on both sides. Factory rivets. No idea if it had duals from the factory (not on the SPID). I've been told in other threads that some trucks had dual exhaust though. Maybe it was only big blocks or something.

In a tangential note the base 427 available in the '69 Impala SS was a single 1.5" pipe. Ouch.

Do you remember if it has the same (or similar) brackets as my pics?

Wow, 1.5" single for a 427?!?

09-01-2014, 07:35 PM	#1
67JimmyMO Registered User Join Date: Jun 2014 Location: Southwest MO Posts: 113	67 GMC-Factory Exhaust Hanger Brackets? My 67 GMC SWB has 3 brackets with a hole (pictured below) attached in various spots down the drivers side frame rail. They are all riveted to the frame so I assume they are OEM. I am converting to V8 and building my own exhaust (Heartbeat 2 1/4" w/Flowmaster clone muffs) and was wondering if trucks with duals from the factory had the same pieces running down the passengers frame rail? If so, do any of the truck parters ever cut those off and sell them? Thanks Attached Images __________________ 1967 GMC SWB 383 Stroker w/Saginaw 4sp 1979 Chev C30 Scottsdale Flatbed 350 4sp 2000 Chev 3500 Flatbed 454 Automatic 1978 GMC 6500 Flatbed Dump 366 5sp + 2sp 1965 Chev K10 LWB 230 4sp 1985 Chev K30 Flatbed 350 4sp

09-02-2014, 04:55 PM	#2
airdale94 Registered User Join Date: Jan 2007 Location: Topeka,KS Posts: 778	Re: 67 GMC-Factory Exhaust Hanger Brackets? I don't think any trucks came with factory duals. __________________ 68' C20. 283CI w/55CC 305HO heads, NP435 Close Ratio, Corp. 14 bolt FF 3.21, 75' front end swap (everything but the X-member).

09-02-2014, 05:47 PM	#3
davepl Registered User Join Date: Aug 2006 Location: Redmond, WA Posts: 6,332	Re: 67 GMC-Factory Exhaust Hanger Brackets? My 402 truck has them on both sides. Factory rivets. No idea if it had duals from the factory (not on the SPID). I've been told in other threads that some trucks had dual exhaust though. Maybe it was only big blocks or something. In a tangential note the base 427 available in the '69 Impala SS was a single 1.5" pipe. Ouch. __________________ 1970 GMC Sierra Grande Custom Camper - Built, not Bought 1969 Pontiac 2+2 427/390 4-speed Coupe 1969 Pontiac 2+2 427/390 4-speed Convertible



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