This is a USED MSD Retard Selector 0-11 degrees part # 8676.
MSD 8676 Timing Module Selector, 0-11 Degrees, 1 Degree Increments @ Speed Tech
MSD Ignition 7762; Power Grid Boost Retard Module, Use with #7730, #7740
MSD Performance 8776 Timing Retard Module Kit
MSD Performance 8774 Timing Retard Module Kit 11deg -15deg
MSD Performance 8777 Retard Module Kit
MSD Ignition Boost Retard Module Power Grid
