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HD10 Engine type
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Uncle Grumpy View Drop Down
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Joined: 14 Jan 2011
Points: 1 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Uncle Grumpy Quote  Post ReplyReply Direct Link To This Post Topic: HD10 Engine type
    Posted: 14 Jan 2011 at 10:09pm
Hi,

I wanted to know if the GM 4-71 used in the HD10 is the low block version or is it the later High Block?

Is there a Allis model that uses the low block?

Cheers
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Coke-in-MN View Drop Down
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Joined: 12 Sep 2009
Location: Afton MN
Points: 41867 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Coke-in-MN Quote  Post ReplyReply Direct Link To This Post Posted: 16 Jan 2011 at 10:26am
Unsure of designation on the engine in block , as the date of this would be pre 1955 guess one could look up when the change was made.
Faith isn't a jump in the dark. It is a walk in the light. Faith is not guessing; it is knowing something.
"Challenges are what make life interesting; overcoming them is what makes life meaningful."
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E7018 View Drop Down
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Joined: 07 Dec 2009
Points: 167 		Post Options Post Options   Thanks (0) Thanks(0)   Quote E7018 Quote  Post ReplyReply Direct Link To This Post Posted: 17 Jan 2011 at 9:40am
One change was on the serial number plate. Before 1947, the designation was 71, after it was A. The change from low block to high block was about then. I ain't for sure, long time ago.
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DMiller View Drop Down
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Joined: 14 Sep 2009
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Points: 33220 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DMiller Quote  Post ReplyReply Direct Link To This Post Posted: 17 Jan 2011 at 6:09pm
When Detroit changed the piston/rod design in the engines during the big drive to put them in trucks they changed the blocks, I believe that was in 49.  Previous to then these engines were only destined for marine and industrial applications.
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