I have finished the design and testing of a new, replacement circuit board for the 74-77 Vega tachometer.
It is a direct plug in replacement for the original GM board, but with modern electronics (accurate to 2%). It can be set up for 4, 6 or 8 cylinder operation.
The board is $75.00 + shipping and this includes calibrating it to your gauge.
I also have a replacement meter assembly for the 71-73 Vega. This updated the gauge to modern air core meter movement
Please e-mail (or PM) me if you're interested.
Thanks,
Tim