Tach wire thru firewall

[wideload714]

My 68 Super Bee never had a factory tach. I've got a tach to put into the dash and the wire to connect it, but I don't know where it came thru the firewall. Do I have to drill a hole for the grommet or where is it routed? I looked in the FSM but could not find it.
Thanks
Darwin

 

[A383Wing]

most factory tach wires went through the bulkhead connector in the same plastic piece that the wiper motor wires are in. You should have a few empty slots in there

 

[hunt2elk]

These cars had a hole in the firewall just for the tach wire next to the bulkhead from factory. I think there is a dimple in the firewall on non tach cars. I'll try to remember to take a pic of one of mine to show where it should be.

 

[440+6]

Through firewall like H2E said. just above the starter solenoid attaching bolts, here is a pic of mine, it's a 70 GTX but I think it's the same.

MINE IS WRONG, the pics below are correct.

 

[hunt2elk]

Here is a shot on my 69 Charger & 69 Road Runner. They are both factory tach cars. It is the grey wire with a black tracer between the bulkhead conn. and the master cylinder. This should be the same as yours.

 

[A383Wing]

I sit corrected....all of mine are through the big bulkhead connector though.....