I dont know what you mean by 'It was not introduced before" I used to own one, parts are avalaible, I have a manual, anybody who works on their car should have a manual. Also it does not have a carburator, it has fuel injection. Alot of "Tubes' - hoses are going to the Fuel injection, which ones do you refer to, It is to in depth to scan and email you a page of the manual. Hanes and Chilton have manuals going back maybe 60 years or more, you order them.
Draw a picture for you? You do know there are maybe 20+ hoses connected to the Injection system. What is screwed up? How does it run? what did the "Hack", or you do to it. Did you pay the guy?