The reason I never fixed the .lua files for the 60sSedan is because I was always trying to improve the model first, but I had a hard time getting it to look right and I lost the file and had to start over from scratch twice with that one.
I have no idea what's causing the ride height issue with the 00sSport, one of my new projects is a 10sSport and it has the exact same problem, even though none of my other cars do. Right now I'm just hoping the same thing doesn't happen with the UE4 versions.
A sports car-ute? Amusing idea I'll see what I can come up with and I will defintely do the convertible and 3dr wagon/shooting brakes (2 of my new projects will also have shooting brake variants, I love them).