Thanks for the review! Yep, 39 pink is the power wire I am referencing. It is currently connected directly to the red power wire of my tach. But if I need that same power wire to run my volt meter/ammeter, my question is how is the best way to connect that additional gauge to that same 39 wire.
121 was also funny, as they provide that to run from the green wire of the tach to the HEI. But, the green wire of the tach itself is over 4 feet long, so I did not need 121 at all. I could still see someone using both wires though, just bc "the instructions said so"
