New Flame-Thrower Electronic Distributors from Pertronix Performance Products. Replace your worn-out Lucas distributor with a brand new electronic unit. Two versions are available: Standard units incorporate the original Ignitor ignition and vacuum advance. The high performance distributor is mechanical advance only and uses the Pertronix Ignitor II micro-processor ignition. Both types are ready for installation with only two wires to connect. They fit all pre-fuel injection six-cylinder Jaguars. The standard units are available in either positive or negative ground; the high performance version is negative ground only. PLEASE NOTE: These distributors are configured for the later-type hold-down clamp. When used on an XK-120, XK-140, MK VII or MK VIII, also purchase a new late-style clamp, part number LU-423605.