You might also want to consider Holley EFI's Sniper system:
https://www.holley.com/brands/...njection/sniper_efi/
Mind you, you'll still need an O2 sensor bung and a second coolant temp sensor. Although the Sniper can control your rad. fans, the coolant temp sensor is for the ECU. I wonder if you could find a tee fitting that would give you enough room for the second sensor?