The Holley Sniper EFI Quadrajet is a self-contained throttle-body injection system that's a direct replacement for spreadbore Quadrajet carburetors found on many classic GM vehicles.

Dyno testing a Holley Sniper EFI kit on a 440. Does it work as advertised?

We install a Holley EFI-ready fuel tank with in-tank fuel pump in our 1964 Chevelle project car, and prepare it for a Sniper EFI system.

Install the throttle body, tighten the retaining nuts and then reconnect the throttle and transmission linkage. The EZ-EFI system comes with a billet aluminum adjustable fuel-pressure regulator.

1. Although nice for its age, this 1964 Chevelle is ready for a new fuel tank. With plans to make the swap to a Holley Sniper EFI system, it was a great time to upgrade to an EFI-ready tank.