1972 Chevrolet Chevelle Holley EFI Tuning at V8 Speed and Resto Shop Posted on by V8 Staff This beautiful blue 1972 Chevrolet Chevelle is powered by a Chevy big block V8 being fed by a Holley Fuel Injection system. It came to visit our shop for some maintenance and to have the EFI system tuned for optimal driveability. 1 2 ►