Ok, here is my question. I have an 80 Malibu with the chevy 229 V6. It also has the sport gauge dash with a clock and no tach. What is required to install a tach in place of the clock AND have it work for a v8? Thanks.
Thanks a lot. So I guess I need to buy a short harness with the filter and the tach. Hopefully that is all I need to do.You should have the white wire for the tach under the dash IF your car came with the optional gauge cluster with the gauges but the large clock instead of the tach.
This will have the spade connector on it that connects to the short harness that goes through the firewall (the one with the tach filter) that plugs into the distributor.
As for the calibration of V6 vs V8, I believe there was something on the back side of the factory tach that could "calibrate it".
You'll need the mounting bracket for the tach..the clock bracket won't work..
The 78-85 tachs had the clock within the tach and the bracket had a cutout for the clock mech.
View attachment 125970
The standard large clock bracket isn't the same..
View attachment 125971
Chevy used different tachs for V6 and V8..
View attachment 125972
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