Heres what I ended up using, it was on sale at Princess Auto for $9.99. It works fine and glows the same green that the 122 dash does, was easy to instal and the wires tuck neatly away into the area between the vent and the opening for the vent. Was three wires, one ground one for the light and one to the coil. I spliced the ligiht wire into the one of the dash lights, now it works with the dimmer switch. I'm not a fan of a huge pod tach in a 122 so this was perfect for me, most of the new aftermarket tach's are either to big or not old enough looking for my tastes.