85mph vs 100mph speedo

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Jethro224

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Jim
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1980
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Working on my dash because I don't have a radio and most everything else ain't working right.
Had my cluster out to clean it up and replace all the bulbs and get the gauges working. Ended up digging some old clusters out of the garage for donor parts. I have a couple of the 100mph speedometers and was wondering if they would be a direct swap for the 85mph unit in my truck now. Anybody know for sure?
 

Turbo4whl

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Working on my dash because I don't have a radio and most everything else ain't working right.
Had my cluster out to clean it up and replace all the bulbs and get the gauges working. Ended up digging some old clusters out of the garage for donor parts. I have a couple of the 100mph speedometers and was wondering if they would be a direct swap for the 85mph unit in my truck now. Anybody know for sure?

Yes, will read correctly. Only difference maybe no lower hole, or too small of a hole for the warning lights.
 

Jethro224

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Illinois
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Jim
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1980
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K20
Engine Size
350
Thanks.
I'm not sure if I'll swap it but good to know it would work. Mine is doing all kinds of strange things. I think I'll try a cable first. Or just clean and lube the old one.
 

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