I found what was told to me to be a 1991 ez go electric 36v cart. It does not have the marathon body. is says txt on the logo but am not sure if that is the original body. Are the bodies of the ez go interchangable????? Is there a way to really check the year of the frame so I know what kits to purchase. I am new to this but am building this with my son. Should be alot of fun. Any help will be greatly helpful.