You wanna share which hookup you used, or is that a guarded secret?

 

I traced and followed the white wire to make sure i was what i wanted and ask a professional and he told use tha it was right. wer Spliced into it as you said and it worked on about the 3rd time. Haha =] but atleast we got it to work.

 

Is the tach jumpy at idle or low rpm's?

 

It is Not Jumpy, Reads the Same Rpm Reading as the in dash tach.