MSD 8578 Small Diameter Pro-Billet Distributor for Ford 351W

Small diameter distributor for 351W, includes iron gear. Must be used with an MSD 6, 7 or 8-series ignition.

MSD engineers fit all of their high performance distributor experience into  a special compact housing designed to be less obtrusive for Ford engines. The diameter of the special cap and housing are 5/8" smaller than stock  Ford distributors providing extra room in front of the engine. The new MSD  cap features spark plug style terminals and is firmly screwed down to the  housing.

Mounted to the top of this shaft is a fully adjustable mechanical advance  assembly. The rate at which the chromoly assembly advances the timing is  easily controlled by changing the supplied advance springs and stop bushing  for total advance.

The distributor relies on MSD's race proven magnetic pickup and precision  reluctor to deliver accurate trigger signals to the MSD Ignition throughout  high rpm. The reluctor assembly is turned by a hardened steel shaft which  rides in a sealed ball bearing for high rpm stability and endurance.

Features:

Polished steel shaft is QPQ coated and guided by a sealed ball bearing

Billet housing is 5/8” smaller in diameter than stock Ford distributors

Easy-to-adjust mechanical advance with supplied springs and stop bushings

Advance weight pins are staked and tig welded to the plate

Must be used with an MSD Ignition Control

CNC machined billet aluminum housing and billet aluminum base

Advance plate and weights are fine blanked from chrome moly steel and QPQ coated for friction reduction

Mechanical advance assembly can be locked out for crank trigger systems

Supplied with small diameter cap with HEI style terminals and race rotor (will accept 8441 Cap-A-Dapt)

Nylon pads ensure smooth operation of the advance weights

No CARB Exemption Order Number

Maintenance-free magnetic pickup and precision reluctor create stable trigger signals throughout the rpm range