Hi again Honger,
This got me wondering what the rules are in Arizona. It may better than you think. Apparently as of 1 JUN 2019 the rules changed to provide an exception for Collectable Vehicles. It is not all that easy to find definitive text on this, but here is some I found in an industry publication:
Exempt Vehicles
Area “A”- Phoenix & Area “B”-Tucson
• Collectable vehicles which meet the following requirements:
1. Either:
a. bears a model year date of original mfg that is at least fifteen years old.
b. is of unique or rare design, of limited production and an object of curiosity.
2. Meets both of the following criteria:
a. Is maintained primarily for use in car club activities, exhibitions, parades or other
functions of public interest or for private collection and is used only infrequently for
other purposes.
b. Has a collectable vehicle or classic automobile insurance coverage that restricts
the collectable vehicle mileage or use or both, and requires the owner to have
another vehicle for personal use.
The actual final rulemaking was here:
You can ignore everything before page 17
And here is another somewhat informative write-up:
Effective June 1, 2019, qualified collectible vehicles in Arizona will be exempt from mandatory emissions inspection and maintenance. That’s good news for classic car owners in Arizona, but what about the rest of the country?
journal.classiccars.com
My suggestion would be to go to the DMV and ask them what documentation they need to support the classification. I'm sure members of this forum would be happy to confirm items 1b above in particular. If they want something more definitive perhaps an email from the Land Cruiser Heritage Museum in Salt Lake. They seem like very nice people.