Got most of the engine bay stripped and removed the auto shifter and pedals. The LS1 pedal brackets match except for the gas pedal . In this pic , you see the LS1 pedals on the left (obviously because they are for a manual ) and the 3rd gen auto pedals on the right. I will have to cut off the gas pedal bracket and discard it . It's ok because the 3rd gen will work just fine. I will need to use the LS1 throttle cable .
