[85S10Eric]

Got a question about putting my tach in. I'm wondering what sort of ignition it's got, so I know where to put the wires. Is it HEI or what? '85 S-10, 2.5 liter Iron Duke.

 

[2.5FearFactory]

yeah it's HEI...wire goes to the white (I think lol) wire to your coil I'm gonna check, though