[Racepres]

They looked like this... from the factory..
https://shop.fiveseasonssportscente...UMENTS/99439-83B-1223/9943983B-220185-H110089
Fugly, but, stock

 

[Racepres]

Oh Shite...
https://shop.fiveseasonssportscente...AL_SUPER_GLIDE_(1993)//INSTRUMENTS_-_FXR_&_FX

Was that one in the Tank????

 

[Racepres]

Wire it accross the coil...
white is "hot" other side [generally black, but the tach wire is pink] is triggers..

 

[Racepres]

??? hot to the tach is the "white wire side" of the coil... triggers... is the opposite side.

Edit; A tach does not really track RPM... it tracks Triggers... or ignition events of the Ignition system...
so... counting triggers, and the rate of their occurance...= RPM... depending how many ignition events occur per revolution of the engine...of course..
Jut wire the +12v to the tach to the side of the coil with the white wire... and the "signal/trigger" side of the tach to the opposite side... all good...