It's a can of worms . . Alkyd enamel is synthetic enamel, these people are sales people wanting to sell you their product, if it had the good hardener in it, it would be cured solid in the can by the time you got it home. We already heard the guy that sprayed it with the acetone and no hardener and took forever to dry, not for me . . .
I really don't like the idea of putting Tractor Paint on as a car finish. Your car is a valuable asset and worthy of some good paint, and it's a Mopar.
If I was buying a classic and the choice was between 2 comparable cars the only difference being one has Tractor Paint as a finish and the other either has Acrylic Enamel, Acrylic Urethane, or BaseCoat/ Clear Coat, I would go with the second choice every time. No Offense but just saying that the car has tractor paint on it makes a person wonder how many other corners were cut on the car.
Kind of between a rock and a hard spot, 200 dollars for cheep price paint or spend the 1,000 and get a finish that commands value. If I had a 401K I would be tapping into that to buy the good paint. Move some money to your Mopar Hard Asset and put a nice finish on it, you will be happy you did come the day you sell it, and all the time you are out running around using it. BaseCoat/ClearCoat is a very forgiving paint to use and much easier to apply, way less dust gets in it, and the clear coat at the end brings it alive.
Just my opinion, take it for what it's worth. All of my projects are assets and they hold value over time.