wiring a tach.

so, the green wire goes to the ( - ) terminal on the coil? black is ground, white is for the light and red is to the ignition switch? is this correct?
i found a tach in my room that i had from a long time ago. a resisitor in it was torched, so i replaced it. now i want to find out if it works. i took it from an old fury in the junkyard a while back.

sounds right according to the last 3 I had

Correct. You can find the wiring on autometer.com...

i hoping you guys know you're dealing with a willing novice. so nothing runs thru the ignation box?