73er Ford LTD Wagon 429ci suitable for everyday use?

Hello, I am looking for a classic truck with a lot of cargo space. I came across the Ford LTD Wagon 1973er 429ci. Does anyone here have experience with the everyday suitability of the vehicle? I want to use it for daily use about 50% AB and 50% city. About 20tkm annual output. Can anyone tell me how high the fuel consumption is in the box in urban traffic and on the AB? Can someone tell me what the weak points of the LTD Wagon are? What do I have to pay attention to? What about the spare parts supply in DE for the LTD Wagon? Is it possible that an experienced LTD hass can be used to advise against unburdening? Are there any other tips and suggestions that I should pay attention to? Does someone have an idea (please ask by PN) how to register an oldie with H-sign registration and car gas/natural gas operation? If you don’t get the latter, where do you end up with the normal insurance and tax at the said car? (without H-character) So I hope many questions are helpful here…