1991 Metric Instrument Cluster USMC

[gmech]

My 1991 4x4 1 ton crew cab instrument cluster gages and speedo are all metric. The truck is a (former) Marine truck. Once a Marine always a Marine!!Not exactly sure what it was used for. I know this because of the USMC inventory sticker on the dash and the data sticker on the core support. Also the truck had a 6.2 with a manual trans. The trans and transfer case were gone before I got it.
Ive got some questions

1- Can I replace the gages etc with U.S. Gages from another dash?
2- I dont see a speedo cable, Is this possibly electronic?
3- If so, would this help if I were to go with a Duramax/Allison trans combo?

[69C20CUSTOM]

1991 should be electronic I pretty sure.
But im not sure about swaping gauges.

Sorry I can help more.

[gmech]

Thanks anyway. Im sure someone has come across this before.

[lanconcj]

The only part of the metric system America wants is the 9mm. Sorry, i know this doesnt answer your question.

[48cj2a]

The transfer case was most likely the NP205 with the electronic speed pickup coming off it. I have a USAF 91 1 ton crew, but mine is a 350FI/4L80E/NP205.

Just look for an electronic mph speedo and swap it out, what are the gauges measured in?

[gmech]

Metrics also. I guess I better start looking.

[WestButteTruck]

I did this with a 94, easy swap out.

[gmech]

Thanks for the help guys. I searched on the website last night and found that alot of folks have swapped them from 90-91 squarebodies when they run electronic trans.