MSD Boost Timing Timing Master Ignition - Must Be Used w/ MSD 6/SCI/7/8/10 Series Ignition Ring and Pinion please see CARB EO# D-550-50/D-550-22

please see CARB EO# D-550-50/D-550-22 for details

230┬║ Water Temp 3/8" NPT sender onlyLongacre is an established brand name in the racing industry and is recognized for dedication to quality

12 x 12-1/2 in Sheet

Chevrolet: Caprice 70 - 72 7

MSD Boost Timing Timing Master Ignition - Must Be Used w/ MSD 6/SCI/7/8/10 Series Ignition Ring and Pinion please see CARB EO# D-550-50/D-550-22The 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 BTM wires