Carburetor, MSD, Holley Sniper EFI questions

You'll also need new resistor plugs and new resistor type spark plug wires. I use OEM application NGK plugs and FireCore wires on all of my installs. You will want to install a fixed orifice PCV valve to work with the Sniper and you should have an O2 bung installed in both head pipes while you're at the exhaust shop. Make sure the bung is installed correctly so you can access the O2 sensor and the harness. You'll need to install the CTS in the hot side of the cooling system so check to see if you have a 3/8 NPT port in your intake. If you don't have a port then you might need to get one of the thermostat spacers I make for the Sniper. You might also need a Sniper throttle bracket that I make. After doing a bunch of Sniper installs I decided to start making the parts that people needed for a clean install.
Thermostat spacer with EFI sensor port | AR Engineering