I will be using a new NV3550 and had planned to rebuild the 1974 lower end, and add a Edlebrock system for the top end, heads,cam,intake,carb, and Mallory ignition, headers.. I can purchase the complete 5.0 serpentine conversion for 250.00, or the complete 5.0 for 650.00. I really don't want to get involved with EFI conversion.