Boost Timing Master for use with MSD Ignition Control - 8762 WHEELCYLINDER 4 V8 1975 - 1978

4 V8 1975 - 1978 GMC K25 Suburban 292/4

7 V8 1970 - 1973 Chevrolet Bel Air 400/6

6 V8 1967 - 1969 Chevrolet C10 Suburban 327/5

7L Hemi and factory dual exhaust

Boost Timing Master for use with MSD Ignition Control - 8762 WHEELCYLINDER 4 V8 1975 - 1978Overview: The Boost Timing Masters allow you to adjust the amount of ignition retard from 1 per pound of boost to 3 per pound via a control knob that you mount on the dashboard. This way you can make adjustments on the fly to prevent detonation as fuel quality or altitude and air quality changes up to a maximum of 15 retard. You can also set a boost pressure point to start the retard. There is a boost pressure port to connect to your manifold and the