Strange HD Pro Differential Case 3.250 in Bore Ford 9 9 1 2 in ALL49323 ApprovedAdvance plate and weights are Steep Angled ApprovedAdvance plate and weights are fine blanked from chrome moly steel and QPQ coated for friction reductionPolished steel shaft is QPQ coated and guided by sealed ball bearingsMaintenance free magnetic pickup and precision reluctor create stable trigger signals throughout the rpm rangeVacuum advance canister for improved economy (can be locked out)Easy to adjust mechanical advance with supplied springs and stop bushingsPowerful built in module produces a 7 You no longer need to buy an entire EFI kit to get the service part you need to get back on the street or the track toggleButton getElementById("more")