77 K10 Tachometer conversion

[77chevyK10]

I want to switch out the fuel gauge foe tachometer on my 77 K10. LMC has a kit but says 78 and up only. Does anyone know if it works on 77 or if here is another option out there besides the whole new kit for $800. I thought there used to be a guy that you could send it to, and he would do the conversion.....????

 

[TPISly-C10]

since i have a clock i chose this tach and don't care about the 4k limit!

 

[bucket]

I want to switch out the fuel gauge foe tachometer on my 77 K10. LMC has a kit but says 78 and up only. Does anyone know if it works on 77 or if here is another option out there besides the whole new kit for $800. I thought there used to be a guy that you could send it to, and he would do the conversion.....????

Depends on what's in the kit. The pinouts on the '76-'77 connector were different than the '78+ cluster.

 

[dvdswan]

Depends on what's in the kit. The pinouts on the '76-'77 connector were different than the '78+ cluster.

The font was different as well. IIRC, it changed again in 81 or 83.

since i have a clock i chose this tach and don't care about the 4k limit!

Be careful with that, most of those are for a diesel engine and will not work on a gas engine. The use different inputs.

 

[Turbo4whl]

The big difference between the early dash and the 78 up is the idiot light window at the bottom of the gauge. The later gauge has a double size window. I would think you could make it work.

You need to move wires around either way. Add a little Dremel tool work and your done.

 

[TPISly-C10]

The big difference between the early dash and the 78 up is the idiot light window at the bottom of the gauge. The later gauge has a double size window. I would think you could make it work.

You need to move wires around either way. Add a little Dremel tool work and your done.

i know been there...new and improve board is on the way....no more bouncing diesel needle!

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[TPISly-C10]

I received my new circuit board and it works perfectly even with the LS engine swaps! no resistor or adapter needed!

here the link: https://www.ebay.com/itm/1425582128...rentrq:8c67715117e0a7b11b0f3afdfff68f2e|iid:1