OK dig out your factory Tachs!
This one just sold on eBay for $415.00
This auction was for a instrument cluster from a 86 chevy truck. it had the factory tach in good working condition. He said it had light surface rust or dirt on the bottom of the speedo and tach. All the mounting tabs were good. He said that on the very bottom next to the gear select indicator there was a piece of the blue plastic broken off.
1986 Chevy Truck & Blazer Instrument cluster w/ TACH 86
eBay Item number: 160040274645
This one just sold on eBay for $415.00
This auction was for a instrument cluster from a 86 chevy truck. it had the factory tach in good working condition. He said it had light surface rust or dirt on the bottom of the speedo and tach. All the mounting tabs were good. He said that on the very bottom next to the gear select indicator there was a piece of the blue plastic broken off.
1986 Chevy Truck & Blazer Instrument cluster w/ TACH 86
eBay Item number: 160040274645


. I still have the 100MPH speedo and the other gauges that came with my tach cluster. I wanted to use the 100MPH speedo in my K5 but it does not have a VSS so it would not work.
. He tests some **** and changes some **** and then it works