Cadillac cruisers will be excited about this new pro-billet distributor for the 368, 425, 472 and 500 cubic inch engines. The distributor begins life as a billet of 6061-t6 aluminum before being CNC-machined to precise dimensions. The sturdy, flex-free housing is fitted with a sealed ball-bearing and long sintered bushing for high-rpm accuracy. MSDs race proven magnetic pick-up supplies a trigger signal that is accurate to within one degree at any rpm. Mounted above this pick-up is an adjustable mechanical advance and is supplied with different springs and stop bushings for a number of curves. For street cruising economy, as if theres any such thing in a caddy, there is a vacuum advance canister.