Sherwood, Hugh; I should add that even though the E.F.I unit never used tubes if tubes were used they wouldn't have been the Achilles heel of that system. Contrary to what the gentlemen claims, heat from the engine would likely have less of an effect on the condition of a tube then it would on a transistor. Transistors hate heat, tubes only function because of the heat produced by the filaments. What would get cooked, however, would be the other components, particularly capacitors, but this is a problem common to any equiptment from that era. As for whether any of these systems still exist I believe there is a unit installed in a DeSoto Adventurer, a 57' Model I believe. This car is featured in the book "Cars of The Fabulous Fifties". I would have to agree about the Imperial being a technical test bed at least for features expensive to produce. My car is from 1954 and has power brakes, power steering, full automatic transmission, power bench seat, and power windows. If you had the money you could also order air conditioning for an extra $500. You could also order the Ausco Lambert disk brakes, if you wanted them. They were standard on a the Crown Imperials, another Industry first. Best Regards Arran Foster 1954 Imperial Newport Needing A Left Side Taillight Bezel and Other Trim Parts.