'85 Grand Prix LS swap Electronic to Mechanical Speedo Converter?

[Shinobi68]

Looking for the correct adaptor to convert the signal to drive the OEM/Stock Speedo? I was going to use the Zero2Sixty converter, but they appear to be out of business. I notice Dakota Digital makes a few, not sure what size the speedo connection is to the guage...maybe 5/8"? Any advice on what to use would be very helpful, all of the other guages in the stock cluster are working, just need to hook up the speedo now.
Thanks

 

[stew86MCSS396]

Not what you asked but I like what was done here…

Thread 'Electronic Speedo Conversion PIC HEAVY!!!!!!!'

Jul 16, 2016

I recently aquired the gauge cluster from a 1988 Monte Carlo SS. It was in really good condition, just needed to be cleaned up. My original one from my SS was cracked and broken so I had to take it out of the car. I converted it over to an electronic speedo using a 1990 K5 Blazer Gauge with the SS Faceplace, and dialed it in.

I started with this Cluster, complete with everything

Took it apart and removed the Speedometer and other small gauges

Using my dremel I cut out the back for the electronic speedo gauge...

• Built6spdMCSS
• 1984 6.0l 6spd carlo electronic speedo monte t56
• Replies: 44
• Forum: How-To's / Knowledge Base

• 
• 
• 

 

[Shinobi68]

Not what you asked but I like what was done here…

Thread 'Electronic Speedo Conversion PIC HEAVY!!!!!!!'

Jul 16, 2016

I recently aquired the gauge cluster from a 1988 Monte Carlo SS. It was in really good condition, just needed to be cleaned up. My original one from my SS was cracked and broken so I had to take it out of the car. I converted it over to an electronic speedo using a 1990 K5 Blazer Gauge with the SS Faceplace, and dialed it in.

I started with this Cluster, complete with everything

Took it apart and removed the Speedometer and other small gauges

Using my dremel I cut out the back for the electronic speedo gauge...

• Built6spdMCSS
• 1984 6.0l 6spd carlo electronic speedo monte t56
• Replies: 44
• Forum: How-To's / Knowledge Base

• 
• 
• 

Thanks I did see this post when I did a search, I'm looking for just a converter box or any other similar ideas vs. replacing with a different guage cluster from a different car. Trying to keep everything appearance wise as original as possible...with the exception of the LS lol.

Wondering if anyone has tried this out?

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