When I build my new motor I intend to go with a Holley super sniper efi. I am curious how it would effect mileage on my current 383 and I may end up installing the FI setup before I get the new motor built.
Depends on how good your current tune is. I gained about 1 MPG going from a carb to EFI (FiTech), however, the drivability and throttle response improvements were worth it alone.
