trouble codes

Alright I'm at the end of my wits. I have a gen 1 Busa engine in my sand car. I'm getting the C24 and C27 codes. (Ignition signal 1 and 4). I ran a NA motor in the car for 12 years. Lost the bottom end. Picked up a new motor and Turbo. Original block was a 2004. New one is 2001. I'm using the...