Holley HP system with Ford TFI- timing synchronization

[Hacksaw]

Originally Posted by Bobby DiDomenico

IIRC there were issues with false readings using certain timing lights and MSD boxes many years ago. Can't remember, was it the adjustable ones?

MSD had a bulletin and they did recommend their light and as I recall a Sears Craftsman. They also said to stay away from the adjustable types. I never trust them. I have been using a self powered unit for years with good results. Easy and quick to hook up as well.