Report Throttle Body EFI for R2? in 1963-64 Avanti Posted February 26, 2021 I recently wrote FITec about running their EFI on a supercharged 289, Their answer is below. We do have a 600 hp power adder unit the part number 30004. If you would like this as a master kit with a inline fuel pump kit the part number is 31004. This unit will work on any engine producing 200 hp to 600 hp. This system will work with power adders like a blower, supercharger, turbo, and nitrous.