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Okay, it wasn't my Z, but I installed a fresh set of Z Therapy carbs on a 72 for a friend.

Sounds like we had similar experiences during the 73 Model Year. I was the New Car Sales Manager at Jaremko Motors in Spokane, Washington. Far too many very unhappy Z Car Customers ! I moved from Washington State to Florida in 1974 and worked at Clearwater Datsun / BMW. Bobby Clark the Dealership Manager was also a Racer. Clearwater Datsun installed the Hood Scoop on two 240Z’s that I knew of. Related to the problems with the 73/74 Flat Top Carbs, Mr Uemura writes in his book; "DATSUN 240Z Engineering Development" https://www.lulu.com/search?adult_audience_rating=00&page=1&pageSize=10&q=Datsun+240Z "Executive Director Ryoichi Nakagawa, the chief of the engine departments, gave us a pep talk, saying, “In a car, the worst case that can happen with this defect is the engine stalling, but if this happens on a plane, it crashes.” Although the engine design departments also tackled countermeasures, satisfactory results were not obtained, and the manager Harada of the Third Design Department asked us to cooperate in coming up with countermeasures for the vehicle itself. As a temporary measure, a heat shield plate was placed between the exhaust system and the carburetor, glass fiber was wrapped around the fuel system pipe, and louvers were cut in the engine hood to vent heat. But this was not enough. Then, as the last resort, a powerful sirocco fan, which began to turn when the temperature in the engine room rose above a given temperature, was installed in the engine room to pump out the heat. This almost solved the problem, but it was never perfect, because the fan would turn for a while or sometimes started turning suddenly even after the engine was turned off, surprising drivers. Assistant Department Manager Shidei, who was the chief engineer at this time, visited America to persuade Nissan Motor Corporation U.S.A., to deal with the problem using this tentative measure for a while until a proper countermeasure could be taken. I can’t imagine that would have been an easy task for him. One year later, we solved the problem properly by abolishing the carburetor and adopting the L28 engine with electronic fuel injection."

The two most judged guys I know (in a good way). @Zup @jfa.series1

I would carefully remove this tag and put it in a clear photo grade plastic sleeve for future reference. All the information a judge would need, if he bothered to look, is embossed on the muffler itself. The exhaust system on my car is all NOS with this very same muffler. As rare as this is, I had the whole exhaust ceramic Jet-Hot coated in the original bare metal finish to preserve it through a life's worth of heat cycles.

That's messed up!!

View Advert S30 Series Type 1 Ducted Air Dam Looking for a S30 Series Type 1 Ducted Air Dam. Last piece needed to complete the car. Thanks in advance for your help. Advertiser Yarb Date 01/15/2023 Price $1,234 Category Parts Wanted Year 1970 Model S30

Do you think @Patcon placed this ad?

Thanks Cliff

Reference I guess. I do not have one on my 240 but the 280 does. It was cheapest at Jegs when I bought that one, free shipping also if I remember correctly. I like the one I have. It had flex and made noise at high speed but I figured out how to reinforce the backside with the OE lip and it worked out great. 280 now, no history with a 240 air dam.

Could be @Mark Maras too! He's had a digit malfunction.

How's those Datsuns running? Mine are nice and tight like they all are so I'm here for the commaradier of those Zs owners.

It doesn't have fingerprint or facial recognition...So I'm good there.

Yup, that's how I mounted the antenna switch on Dale's Series One.