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  #1  
Old March 26th, 2017, 02:19 AM
BillT BillT is offline
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Default Gmc 637 v-8

Wanted to share a video that got posted recently online. The 637 V-8 is the engine that replaced the 702 V-12. It was made approx from '66 to '72. I used to drive a '71 GMC 9500 with a 637 along with the rare combination of a 10-Speed Road Ranger Trans. Although they are very different internally, the 637 is like a 478 V-6 with 2 extra cylinders "welded" on it. They have the same amount of Cubic Inches per cylinder. This engine sounds pretty different without an exhaust system on it and typically, not as good:

https://www.youtube.com/watch?v=9rckE_Xb8Kk
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Drove:
-'60 GMC 2500 Dump, 305 V-6
-'62 GMC 6500 Flatbed Dump, 478 V-6
-'67 GMC 1500 Pick-up, 305 V-6
-'71 GMC 9500 Flatbed Dump, 637 V-8

Owned:
-'62 GMC 4000 Flatbed, 305 V-6
-'64 GMC 1500 Pick-up, 305 V-6
-'66 GMC 1000 Pick-up, 305 V-6
-'67 GMC 7500 Box, 6V-53 Detroit
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  #2  
Old March 26th, 2017, 06:08 AM
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Funky61 Funky61 is online now
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Default Re: Gmc 637 v-8

Great Vid: Love how smooth that monster V-8 purrs.
Thanks for posting
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  #3  
Old March 26th, 2017, 06:41 AM
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TJ's GMC TJ's GMC is offline
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Default Re: Gmc 637 v-8

Man I want one of those so bad. Thanks for sharing!
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"Excuse the rust I use my truck"
1964 GMC 1500 305E/sm420 4 barrel intake mod and dual exhaust.
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1964 Chevy C20 292/SM420
1966 Chevy C10 292 hotrod 6/TKO600
1977 Chevy C20 572 BBC/TH400
1984 Chevy C30 292/SM465

My youtube channel aka Military Chevy:
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  #4  
Old March 26th, 2017, 07:36 AM
George Bongert George Bongert is offline
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Default Re: Gmc 637 v-8

Thanks for posting this video BillT!! The 637 V-8 may not have the sweet sound of the V-6's, but none the less, this particular 637 is a smooth runner, and "purrs like a kitten"!!
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  #5  
Old March 27th, 2017, 12:23 AM
2-Ton 2-Ton is offline
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Default Re: Gmc 637 v-8

Well, I just did a write up of our 9500 GMC Firetruck with the 637.
Clicked the wrong button and it was gone.
So here are pictures of ours and the engine runs really smooth.
http://s893.photobucket.com/user/2-T...?sort=3&page=1
I have more pictures of the 637 somewhere and may look latter.

Here are some pictures of the 65 1-Ton I acquired a few weeks ago.
It has the 292 six in it.
http://s893.photobucket.com/user/2-T...?sort=3&page=1

Don
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  #6  
Old March 27th, 2017, 04:03 AM
BillT BillT is offline
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Default Re: Gmc 637 v-8

Looks good. I remember your truck (by pictures) from a few years back.

Is your 9500 a TE ?

Like your newly acquired 1-Ton. I had a '64 C-30 very much like it, 6-292, 4-Speed and all. It was one of the best trucks I ever owned.
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Drove:
-'60 GMC 2500 Dump, 305 V-6
-'62 GMC 6500 Flatbed Dump, 478 V-6
-'67 GMC 1500 Pick-up, 305 V-6
-'71 GMC 9500 Flatbed Dump, 637 V-8

Owned:
-'62 GMC 4000 Flatbed, 305 V-6
-'64 GMC 1500 Pick-up, 305 V-6
-'66 GMC 1000 Pick-up, 305 V-6
-'67 GMC 7500 Box, 6V-53 Detroit
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  #7  
Old March 27th, 2017, 01:08 PM
2-Ton 2-Ton is offline
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Join Date: Feb 2013
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Truck: 1967 GMC 9500 COE Ladder/Pumper with the 637 gas V-8
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Default Re: Gmc 637 v-8

Thanks BillT
I'm lucky to have a wife that doesn't mind when I bring things home.
As long as the bills get paid and I don't complain about what she brings home, life is good.
Check out my Photobucket Library to see some of the other toys.
http://s893.photobucket.com/user/2-T...?sort=3&page=1

Don
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  #8  
Old March 27th, 2017, 06:23 PM
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TJ's GMC TJ's GMC is offline
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Default Re: Gmc 637 v-8

Quote:
Originally Posted by BillT View Post
Looks good. I remember your truck (by pictures) from a few years back.

Is your 9500 a TE ?

Like your newly acquired 1-Ton. I had a '64 C-30 very much like it, 6-292, 4-Speed and all. It was one of the best trucks I ever owned.
Both my 66 chevy and 64 chevy had 292's in them. They were torquey engines. Kept the 292 in my 66 and woke it up a bit.
__________________
"Excuse the rust I use my truck"
1964 GMC 1500 305E/sm420 4 barrel intake mod and dual exhaust.
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

1964 Chevy C20 292/SM420
1966 Chevy C10 292 hotrod 6/TKO600
1977 Chevy C20 572 BBC/TH400
1984 Chevy C30 292/SM465

My youtube channel aka Military Chevy:
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
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  #9  
Old April 1st, 2017, 04:03 PM
2-Ton 2-Ton is offline
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Join Date: Feb 2013
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Truck: 1967 GMC 9500 COE Ladder/Pumper with the 637 gas V-8
Age: 62
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2-Ton is on a distinguished road
Default Re: Gmc 637 v-8

Sorry
I've been busy and have not had time to post anymore info.
Here is the write up on the GMC 9500 with the 637 ci.

http://www.stovebolt.com/gallery/king%20don%201967.html

Don
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  #10  
Old April 1st, 2017, 04:05 PM
2-Ton 2-Ton is offline
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Join Date: Feb 2013
Location: Mokane, Mo.
Truck: 1967 GMC 9500 COE Ladder/Pumper with the 637 gas V-8
Age: 62
Posts: 34
Rep Power: 39
2-Ton is on a distinguished road
Default Re: Gmc 637 v-8

Here is the write up of our GMC 9500 with the 637.

http://www.stovebolt.com/gallery/king%20don%201967.html

Don
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