Any Older Fords using a Stewart Warner Performance Tach?

[RSP]

I have the Stewart warner performance series Tach that hooks to the alternator, I cant figure out thier instructions, It says to "See Dip Pin Settings guide" But I have no clue where thats at and they wont answer Tech or return my calls so I thought maybe someone else has this same Tach and figured it out. This is the Tach http://www.sw-performance.com/index.php?page=details&p=114030