1963-1967 C2 Ignition Coil Ballast Resistor - GM - OEM Number(s) (19017084)
This
1963-1967 Ignition Ballast Resistor is the white porcelain block located on the driver side firewall. It is an electric resistor that converts 12 Volt current to 9.5 Volts to prevent premature coil & ignition contact points failure. If your Corvette will crank and start and then quit as soon as the key is released to the RUN position, your ballast resistor may need to be replaced.
Also known under these part numbers: (For reference only)