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  #1  
Old November 23rd, 2020, 07:31 AM
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Default GMC’s 1960 V-6-powered trucks were the original professional grade

Nice article in Hemmings about our trucks.

https://www.hemmings.com/stories/art...ign=2020-11-18

Lots of comments below the article too -- mostly good but a few not so good.
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Old November 23rd, 2020, 01:43 PM
BillT BillT is offline
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Default Re: GMC’s 1960 V-6-powered trucks were the original professional grade

Quote:
Originally Posted by Ed Snyder View Post
Lots of comments below the article too -- mostly good but a few not so good.
I'm a big fan of GMC V-6's. Drove a '62 6500 with a 478. Great, tough truck, great reliability. We also had other V-6's, 1-Tons, 3/4 Tons and 1/2 Tons in our fleet. A '62 305 did get a cracked block once. Even liked the 637 V-8 in our 9500. But in my personal truck, a '66 1000 Pick-up with a 305 V-6, I had pretty horrible luck with it. Just one of those freaky things I would say.
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Drove and owned many, but some of the more interesting ones were:

-'60 GMC 2500 Dump, 305 V-6
-'62 GMC 4000 Flatbed, 305 V-6
-'62 GMC 6500 Flatbed Dump, 478 V-6
-'67 GMC 7500 Box, 6V-53 Detroit
-'71 GMC 9500 Flatbed Dump, 637 V-8
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Old November 23rd, 2020, 05:30 PM
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Default Re: GMC’s 1960 V-6-powered trucks were the original professional grade

Great article Ed, thanks for Posting. I enjoyed the stories and comments that followed as well
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Old November 24th, 2020, 07:03 PM
Jim A Jim A is offline
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Default Re: GMC’s 1960 V-6-powered trucks were the original professional grade

Great article, I always like to read good things about my truck of fifty years.

It is a little hard to believe, however, that the cooling system pumps 141 gallons per minute. That seems exaggerated.
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Old November 24th, 2020, 07:44 PM
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Default Re: GMC’s 1960 V-6-powered trucks were the original professional grade

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Originally Posted by Jim A View Post
Great article, I always like to read good things about my truck of fifty years.

It is a little hard to believe, however, that the cooling system pumps 141 gallons per minute. That seems exaggerated.
That 141 GPM is definitely exaggerated. The original brochures I have from the 1960s say that the flow rate was only 135 GPM at 3400 RPM.
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1962 K1000 Suburban 401M & SM420
1965 2500 Suburban 351C & SM420 with Watson overdrive
1967 CM1500 pickup 351E & NP435
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Old November 25th, 2020, 04:52 PM
Jim A Jim A is offline
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Default Re: GMC’s 1960 V-6-powered trucks were the original professional grade

Ed
Even 135 sounds high.
That works out to recirculation of all coolant every 18 seconds, which would be the time for total loss if the top hose goes.
It is a pretty big pump though.
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