Yes the O2 sensor is snug in the header collector. I will be adding coolant during lunch and let it sit until after work. I still had to install the 10 micron fuel filter to the fuel system. I powered the Terminator, screen came on along with the LED lights on the ECU but I didn't program it.
I still have the gray wire to connect to the brake light switch, Can some one tell me how they did it? I have a three way connector I plan on using but if there is another option around I'd like to take it into consideration.
As for grounds what did you use? I know the Terminator X likes to be well grounded and I sanded to bare metal and screwed 2 terminals to body inside the cab. I did 2 separate grounds from battery to block and frame and then frame to block, and block to firewall. The one from block to firewall started to rust a bit at the firewall and that is my concern that later the rust will interfere with the terminals making good contact.