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1970 Z432 spark plug wires

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Does anyone know what the correct spark plug wires should be on a 1970 432? Or a contact that would know. Ours currently has some aftermarket ones that are bright blue and do not appear period correct. This car is pretty much perfect besides the wrong spark plug wires.

Chassis PS30-00092

Thanks, Justin  

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The original plug HT leads were individual part numbers 22451-A0203 (plug no.1) through 22456-A0203 (plug no.6) and they came ready to fit with both ends complete and including the boots for the distributor end, the long plug connectors and the rubber seals that go into the cam cover. They were individually numbered for each plug, also dated, and with makers name SUMITOMO, all printed in yellow on black wires. 

The long HT lead from the coil to the distributor cap was part number 22450-E4200.

Here are some (not very good...) photos which might give you an inkling of what they looked like:

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If you're chasing factory period-correct original you've got your work cut out. The ignition system is a recent (Ultra?) system, you need a cloth-covered top hose and the Tsuchiya service sticker for the air filter should be on the top of the air filter box itself (in front of the radiator) not on the duct. Couple or three non-factory drilled holes there too (annoying, isn't it!?). All an easy fix, apart from the holes - and I'd just stick grommets in them and not worry.

You might be able to get the correct leads from REVIVE JALOPY or RUBBER SOUL in Japan. If they can't supply the correct, Sumitomo printed, version they should be able to supply a decent replica in black, which will certainly be far more pleasing to the eye than blue or red.    

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Full ignition system illustration from 1969 Nissan 'Service Shuho' publication No.184:

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