Classic FAST Edis tach hook up

[blown96w]

I have a classic fast box that im using Edis on a Ford 4v. What wire do I need to us to hook up an Autometer tach, or do I need to use a tach adapter? Thanks in advance

 

[HighPSI]

Pin C15 can be connected to an aftermarket, electronically driven tachometer. This
should work with most factory tachometers as well.

 

[blown96w]

Thank you