Factory Big Block Question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

1956cameo · 08-03-2011, 09:44 PM

I had a question about the exhaust hangers for factory big block trucks. I have a 1969 factory short bed, 1/2 ton, big block truck, a 1970 factory long bed, 1/2 ton, big block truck, and two 1972 factory big block 3/4 ton suburbans. All of the trucks seem to be fairly original and complete. Both of the suburbans have the obvious big block hangers on them, but the two trucks dont seem to have the hangers (at the very least they dont have the large hangers on the rear section of the frame). Did the big block exhaust hangers come on all years of factory big block trucks? Were they the exact same for all years or were they different? Thanks for any input!

**too much stuff** · 08-03-2011, 11:15 PM

Im not positive, but i don't think all big block trucks had dual exhaust.

chewychevy67 · 08-04-2011, 12:19 AM

all i know is that coil and leaf spring rears used different hangers

**70cst** · 08-04-2011, 08:40 AM

Quote:

Originally Posted by too much stuff

Im not positive, but i don't think all big block trucks had dual exhaust.

I thought all BB trucks had dual exhausts...

Ok...now I am courious .... the answer is ?

1956cameo · 08-08-2011, 07:23 PM

I didn't really pay attention to if they were dual or single exhausts. I just noticed that the trucks didn't have the exhaust hangers on the frame (at least the large ones in the rear).

VA72C10 · 08-08-2011, 08:01 PM

Interesting thread. As mentioned, the leaf and coil rear hangers are different...other than that I'm not sure...

Duncan and son · 08-08-2011, 10:25 PM

As for as I know all BB were dual exhaust (it was not offered as an option on BB). As mentioned ealier different hangers on leaf and coil.
Hope that helps Paul

71 super · 08-08-2011, 10:33 PM

the big hangers were a 72 thing, the early 71 trucks had the twisted strap type things that GM used on the early years

Duncan and son · 08-08-2011, 11:04 PM

Quote:

Originally Posted by 71 super

the big hangers were a 72 thing, the early 71 trucks had the twisted strap type things that GM used on the early years

Harold, do you also think all BB were dual exhaust? I guess I am thinking 71-72. Not positive on 68-70.

71 super · 08-09-2011, 07:53 AM

Not positive on the 68 trucks- never seen one as bb originally around here so cant speak from experience, but the last 69 that was on the place was a factory dual exhaust truck. I would bet that dewayne's 1970 cst truck still has the hangers still in place if he will post some frame pictures, which will help at least for that year. My truck has the larger hangers in the rear like a 72, but it was a late 71 so I am no help in that respect.

**RenoKeene** · 08-09-2011, 08:10 AM

Anyone have pics of whats correct for a 70 BB GMC coil spring SWB stepper?

**70cst** · 08-09-2011, 09:30 AM

Quote:

Originally Posted by 71 super

Not positive on the 68 trucks- never seen one as bb originally around here so cant speak from experience, but the last 69 that was on the place was a factory dual exhaust truck. I would bet that dewayne's 1970 cst truck still has the hangers still in place if he will post some frame pictures, which will help at least for that year. My truck has the larger hangers in the rear like a 72, but it was a late 71 so I am no help in that respect.

I'll try and get pics this week end...

Maybe others can beat me to it and submit some pics...

1956cameo · 08-11-2011, 06:49 PM

Thanks for all the help so far everyone! At least I know why the trucks dont have the large rear hangers, and why the suburbans do. It was a 1972 thing. I will try to get pics of the hangers that are on the trucks this weekend.

08-03-2011, 09:44 PM	#1
1956cameo Registered User Join Date: Apr 2008 Location: Angleton, TX Posts: 2,219	Factory Big Block Question I had a question about the exhaust hangers for factory big block trucks. I have a 1969 factory short bed, 1/2 ton, big block truck, a 1970 factory long bed, 1/2 ton, big block truck, and two 1972 factory big block 3/4 ton suburbans. All of the trucks seem to be fairly original and complete. Both of the suburbans have the obvious big block hangers on them, but the two trucks dont seem to have the hangers (at the very least they dont have the large hangers on the rear section of the frame). Did the big block exhaust hangers come on all years of factory big block trucks? Were they the exact same for all years or were they different? Thanks for any input! __________________ I don't always drive trucks; but when I do I prefer Chevy's. Stay driving my friends. '72 blazer 2wd build 67-72 Factory Big Block Registry

08-03-2011, 11:15 PM	#2
too much stuff Roadtrip! Join Date: Feb 2003 Location: Grand Rapids MN Posts: 13,715	Re: Factory Big Block Question Im not positive, but i don't think all big block trucks had dual exhaust. __________________ 67 gmc custom lwb dakota truck. Sold...And bought back 69 swb 4x4 project (in progress) 70 c-10 lwb texas truck 70 4x4/BB/bkts/posi/tach(retired) 70 swb (wifes) 70 jimmy camper 71 K-5 factory 2wd 71 cheyenne 4x4/tach/posi/ plow rig 71 Cheyenne20 BB, buckets, tach, tilt, 4 speed 72 jimmy CST wyoming rig 72 jimmy Colorado rig 72 lifted texas 4x4 3/4 ton burb 65 fury conv. 383/auto 65 chrysler 300 "L" 413 auto

08-04-2011, 12:19 AM	#3
chewychevy67 Registered User Join Date: Jan 2010 Location: Here Posts: 5,454	Re: Factory Big Block Question all i know is that coil and leaf spring rears used different hangers

08-08-2011, 07:23 PM	#5
1956cameo Registered User Join Date: Apr 2008 Location: Angleton, TX Posts: 2,219	Re: Factory Big Block Question I didn't really pay attention to if they were dual or single exhausts. I just noticed that the trucks didn't have the exhaust hangers on the frame (at least the large ones in the rear). __________________ I don't always drive trucks; but when I do I prefer Chevy's. Stay driving my friends. '72 blazer 2wd build 67-72 Factory Big Block Registry

08-08-2011, 08:01 PM	#6
VA72C10 VA72C10 Join Date: Mar 2008 Location: Midlothian, VA Posts: 25,269	Re: Factory Big Block Question Interesting thread. As mentioned, the leaf and coil rear hangers are different...other than that I'm not sure... __________________ Looking for a 67-72 swb or blazer project in or around VA.

08-08-2011, 10:25 PM	#7
Duncan and son Registered User Join Date: Sep 2009 Location: Lubbock Texas Posts: 1,049	Re: Factory Big Block Question As for as I know all BB were dual exhaust (it was not offered as an option on BB). As mentioned ealier different hangers on leaf and coil. Hope that helps Paul __________________ You can shear a sheep every year, but you can only skin it once The person dealing with facts is never at the mercy of the person dealing with theory 1972 Cheyenne Super 402 400 A/c bucket seat tilt custom camper Longhorn 1975 Silverado 454 Crew cab camper special dually

08-08-2011, 10:33 PM	#8
71 super Registered User Join Date: Sep 2005 Location: Canton North carolina Posts: 3,079	Re: Factory Big Block Question the big hangers were a 72 thing, the early 71 trucks had the twisted strap type things that GM used on the early years __________________ 67 blue step side- bb 68 gold and white swb cst anniversary 68 custom swb hot rod Ls swap 69 swb cst 6 cylinder/ overdrive 69 black/black cst bb swb 70 orange and white cst Canada built truck swb bb 71 black and white super swb bb 71 red and white super swb 72 green and white super swb 4x4 62 nova wagon 400 series Ls swapped 68 Camaro 327/4 speed- 1 owner, original paint 66 Volkswagen bettle 69 auto stick Volkswagen Beetle

08-09-2011, 07:53 AM	#10
71 super Registered User Join Date: Sep 2005 Location: Canton North carolina Posts: 3,079	Re: Factory Big Block Question Not positive on the 68 trucks- never seen one as bb originally around here so cant speak from experience, but the last 69 that was on the place was a factory dual exhaust truck. I would bet that dewayne's 1970 cst truck still has the hangers still in place if he will post some frame pictures, which will help at least for that year. My truck has the larger hangers in the rear like a 72, but it was a late 71 so I am no help in that respect. __________________ 67 blue step side- bb 68 gold and white swb cst anniversary 68 custom swb hot rod Ls swap 69 swb cst 6 cylinder/ overdrive 69 black/black cst bb swb 70 orange and white cst Canada built truck swb bb 71 black and white super swb bb 71 red and white super swb 72 green and white super swb 4x4 62 nova wagon 400 series Ls swapped 68 Camaro 327/4 speed- 1 owner, original paint 66 Volkswagen bettle 69 auto stick Volkswagen Beetle

08-09-2011, 08:10 AM	#11
RenoKeene Florida Edition Join Date: Oct 2010 Location: Fruitland Park, FL Posts: 4,022	Re: Factory Big Block Question Anyone have pics of whats correct for a 70 BB GMC coil spring SWB stepper? __________________ 70 GMC Short Stepside "Rose"-An American Beauty: Factory 402/TH400, AM/FM, AC, Tilt, Tach, Buckets, Posi, PS, PB, 3-5 Drop, Complete Resto-Rod 67 C-20 Slant Back Wrecker "Mad Max" 67 C-10 Ratrod "Step-N-Wolf" 71 Serro Scotty Sportsman camper "Scotty" 97 LT1 Z28 "The Hornet" Link to more pics of "Rose" http://67-72chevytrucks.com/vboard/a...p?albumid=1684 Check out my "Cheap Tricks" thread and add to it if you can, lots of good info there. http://67-72chevytrucks.com/vboard/s...d.php?t=489394

08-11-2011, 06:49 PM	#13
1956cameo Registered User Join Date: Apr 2008 Location: Angleton, TX Posts: 2,219	Re: Factory Big Block Question Thanks for all the help so far everyone! At least I know why the trucks dont have the large rear hangers, and why the suburbans do. It was a 1972 thing. I will try to get pics of the hangers that are on the trucks this weekend. __________________ I don't always drive trucks; but when I do I prefer Chevy's. Stay driving my friends. '72 blazer 2wd build 67-72 Factory Big Block Registry



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