Sorry for being off topic, but after 6 months of frustration I finally got it solved. Car was a 99 camaro with GMPP LS2. Regardless of what I did, I still had no tach and got the same 2 stupid codes. I owe a huge thanks to RAO who suggested the timing gear should be the 1x versus the 4x. He was dead on. Thanks much to everyone who helped me along the way.