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Home » ATHS Discussion Forums » General Discussion » '71 GMC 9500 Dump, Extended Hood.

'71 GMC 9500 Dump, Extended Hood.

Posted By C10 - C90 Bill Saturday, July 31, 2010 3:36 PM
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'71 GMC 9500 Dump, Extended Hood.

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Road Boss
Posted Sunday, February 20, 2011 6:23 AM
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These trucks really had a classic look to them.  With more tasteful styling these would like great on the road today. 
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C10 - C90 Bill
Posted Thursday, August 05, 2010 5:46 AM
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BobBray (8/5/2010)
Were the 6V-53 JV 7500's the ones with the smaller doghouse that covered the air brake compressor? 


My '67 7500 with a 6V53 had the Compressor Regulator under the dog house and not real fun to change.  I have heard that the newer 7500's had them in a more convienient place. 

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Bill White
Posted Thursday, August 05, 2010 5:21 AM
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Ashton,

My 9500 had no air cond. and I did not order air cond. until the eary 80s

(I got tired of hearing drivers cry) and I had a  Farr air cleaner that mounted outside the hood.

Bill


athscentraliowa.org
47 Willys CJ2A, 47 Bantam T3C, 47 Diamond T 910, 53 White WC24, 49 IH KBS11
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Ashton Lewis
Posted Thursday, August 05, 2010 12:52 AM
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C10-C90 Bill,

I never saw a GMC or Chevrolet convential cab with a 12V-71N. The second letter of the model designation is the engine type. H-8V-71, I-6-71, P-12V-71, C-NTC Cummins, etc. There never was a MP model which would have been a 1143/4" bbc 6x4 truck or tractor with 12V-71 engine. If they did build 12V-71s in long hoods it would have been a SEO (special equiptment option) offering of a MH model. Each year they published a SEO book of about 20 pages listing the SEOs. In the published SEOs the 12V-71 was never listed. Attached is picture of an SEO, which is air conditioning on a DP model a 12V-71 aluminum tilt cab. The air conditioning compressor was installed after the truck came of the assembly line in the shop where they did these type of additions. On 8v-71s the a.c. compressor was mounted on the top front of the engine and this could not be done on a 12V-71. The Bendix air compressor had a through shaft with a pulley to drive the Frigidaire compressor. It is all GMC factory installed but boy does it look home made. Check out the belt shield and the belt tension adjustment bracketry.

I think we can now agree that if they did install a 12V-71 in a 1143/4" bbc cab you were not going to have air conditioning.

I also agree with others before me who have said the engine probably would not have fit. Didn't Peterbilt require an extended hood for the 12V-71 and I think their standard hood was a 119" cab so why would it fit in a 1143/4" cab?

My biggest reason for saying NO to a 12V-71 M model is where would you install two air cleaners? The fiberglass hood had two inlets and molded ducting to one air cleaner. In the 70s there was no single air cleaner that could flow and filter enough air under the hood.

Some say anything is possible!

Ashton Lewis
Attachments 12v71a.jpg (2,281 views, 747.38 KB)
12v71b.jpg (2,211 views, 1.20 MB)
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BobBray
Posted Wednesday, August 04, 2010 10:08 PM
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Were the 6V-53 JV 7500's the ones with the smaller doghouse that covered the air brake compressor?  I also remember seeing a few JE and HE 8500's which had 427 gassers in them (and no doghouse).
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C10 - C90 Bill
Posted Wednesday, August 04, 2010 5:01 PM
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Ashton,

In your experiences selling new trucks, did you ever see a C-90 or a MH 9500 with a 12V71?  (Trying to stay as neutral as I can here.  I have respect for both sides of the debate).

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Edited Wednesday, August 04, 2010 5:07 PM by C10 - C90 Bill
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junkmandan
Posted Wednesday, August 04, 2010 4:43 PM
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Although not stated in the ad,the Chevy log truck has a 1 piece windshield  ,and with the 5.17 gear ratio probably has a 6V53 engine .
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Ashton Lewis
Posted Wednesday, August 04, 2010 4:29 PM
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C10-C90 Bill,

The truck may very well be a 7500 series with regular production option T50 tilt hood. I sold quite a few Chevrolet's in the 1970's which were model JV72013. The JV was 6V-53 powered. They came standard with butterfly hoods and I ordered them with tilt hood. The 8500 and 9500 all had two piece windshields. The 7500 cab would not have come with a large enough dog house to accept a 6-71 or NHC250 Cummins which would have been the engine in a 9500.

Ashton Lewis
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long9500
Posted Wednesday, August 04, 2010 3:58 PM
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I'm late to this conversation, been away from the computer for a few weeks. Getting back to the 12v71 topic, i looked at a MH9500 in northwestern Ontario hauling pulpwood that had a 12v71 in it and the high mount cab. From what I could remember it had a short dog house in the cab like the short nose with a 6v92. Not sure if any of this was factory.

As far as the 2 lower headlights and the 4 head lights, federal regulation for head light distance to ground is 54" maximum i believe, and a high mount cab would make the 4 lights in the center of the grill too high.

Jason Long

Cusson, Mn.

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C10 - C90 Bill
Posted Wednesday, August 04, 2010 2:49 PM
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[quote]i also found what appears to be a gmc 9500 but with a chevy c90 grill in it just like the other truck was posted only the gmc lettering is not there http://www.logtruckforsale.com/gmc_9500.php[/quote]

It looks like it has a Chevy Tilt Nose on it.  Also looks like it had the cab changed, if it is an original 9500.  It has a 1-piece windshield. 

It list a lot of things about the truck, but doesn't mention the engine. 

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60-72 Chev/GMC Fan
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Detroit Diesel Fan
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