Need some opinions

First and foremost get a title in your name.,
Definitely get fresh gas maybe pop the carburetor off and sray it inside and out with carb cleaner... Try a new ballast resistor that ceramic piece on the firewall or on the fender wall... That could have been the piece that took the car out in the first place if it acts like it wants to start but doesn't run once you let the key go...
I personally would just clean it and clean it and not put any money or get upside down and it whatsoever.. you're a Jeep guy knotted 74 Dodge dart guy... The minute you pay a mechanic to do an engine swap plus all the parts it's instantly going to be worth less than what you have in it....
Number one get a title in your name number two get it running and number three just clean clean and don't go upside down...