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I have a few questions about spark plug wires for a '48 Deluxe Eight. This car is equipped with an 'Electromatic' clutch system.
1.) Are straight un-insulated terminals used on all eight plug wires, or does the 'E' clutch system equipped cars require angled terminals on the rear three cylinders?
2.) Is black cotton covered wire correct, and if so is the finish dull, or does it have a luster?

Thanks dp

Cotton-wrapped high tension wires are lacquer coated and thus have a gloss.

I don't believe spark plug boots were used on the plug wires from the factory until 1953/54.

I can't help you on the composition of the wire covering but here is a factory photo from the EC training manual published, I believe, during the 22nd series clearly showing the straight uninsulated ends on the rear cylinders.

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Thanks to all about the spark plug wire material and terminals.

I downloaded the EC training manual that Howard mentioned, and promptly fell-in head first. Currently I think my EC system is complete, however I disconnected the power to the unit when I first bought the car, just in-case. It is clear from the picture in the manual that the rear cylinder spark plug terminals are straight.

I'll proceed with the plug wires and let the EC be a future project.

Thanks again, dp