According to the garage floor, my Challenger was loosing more oil than Kuwait is exporting in a full year, so I had to find a garage and brought it there. It's currently on the lift and the reason was that the oil-pan was dented, but no bad damage so this is an easy fix. While it's there I'll have the tranny redone, the engine seemingly has been redone recently (I've only had the car for 2.5 months now) and is still very clean, you can imagine how glad I was to hear that.
They said the fuel gauge is already fixed, was an electrical problem they mentioned they had found, will have to ask what exactly that was.
Also, they showed me some plugged holes in the sheet metal that they said someone used to undercoat the car, does someone have more information about how that works? Luckily the metal is still in very good condition all around.
Forgive my noob "restoration" project, I know the stuff here is ridiculous when compared to all the other projects of you guys.