The tach is an issue. In the end I had to admit defeat and sent the PCM to Hot wire in Ark. Chris owns the joint and he reflashed so now I am using a Dakota dash that has tach integrated. I can check my wire diagram notes on the tach input details. Likely be much the same other than termination point becomes Auto meter vs Dakota. And yes, good eye it is a Scat Pack next to Cuda. Beauty and the beast if you will.