Seon it looks like you about have that project wipped.I know the Vortec after market wiring is impossible to get so you are stuck with the rats nest.That is why I steered away from that setup because its not easy.We currently have a Vortec on our Dyno and we did not get the under dash harness. We can run it but we need to see the sensor data to continue.So make sure your OBDII connector is functioning as it was in the truck .You will need it if you have any running issues.Carb would be easy but thats no fun.


In the works 2006 GEN III 6.0 /4L80E/ 205 New process,A/C and power brakes .