Yep, agree with Mark,
Literally the only things that are typical additions are the ballast weight and roll bars. ..and that is just for UK style tracks...pretty sure for clay/dirt it'd be fine!
Car doesn't 'essentially' need anything else.
Pretty much race ready straight out of the box!
I'm even beginning to doubt the wisdom of ceramic balls...although they do build nice smooth diff's initially, and probably are a better diff to begin with, and the balls themselves probably last ok, they wear the plates out much faster because they are a much harder material...although the plates are cheaper, it does mean the diff's last a shorter time so your rebuilding more often!
I plan on testing this theory over the coming year
