Hmm Hillclimb.
Well, I guess it would be bad form to openly promote another sim, so I'll give you a clue.
A certain other Sim is "close" (read within the next day to a year - maybe!!!) to releasing a pro-team sponsored hill climb add-on (Trento-Bondone) and associated car (or cars?).... Supposedly it's been tested by some Hill-Climb driver for what that's worth.
The sim? Well that is the tricky part since it's not LFS. Here's a clue, get a notepad ready! - It begins with an 'n' and ends with "etKar"
Once you complete that challenge, a little look at the RSC forum should enlighten you a bit more...
Toad.