Directdrive, Your post brought back memories from my past. Where are you going to race? Welcome to Bob's 4cycle. The last time the CSC classes ran Mod animal was about 10 years ago. It was the fat boys mod animal @ 380 or 390#'s on Methanol. If you are what your screen name implies you don't need a clutch. I still have some old mod animals, direct drive gears, Championship trophies and jackets sitting on the shelf if you are in need of any help. Flash-o-matic makes many valid points yet there has been a bit of a push lately towards adult industrial 4 stroke racing here in Colorado with people wanting to use anything from the LO206 to mod big blocks, like PD said "because they can". The problem becomes finding a way to let every one run what they want and also end up with competitive racing. Strict limiting rules are the easy way to even out the competition but that doesn't promote old and new racers to utilize what ever they want to on race day. I recently came up with an idea that might be a way to make that happen and think it may be tested out a few times next season.
It's Bracket kart racing where you qualify and that time is used to determine when you start the race and you are penalized after the race for any lap time that you run that was faster than your qualifying time. This prevents sand bagging and promotes consistent lap times. The slower qualifying brackets get a timed head start to the faster brackets then ideally if everyone is consistent to there qualifying time, everyone would cross the finish line at the same time LOL. With Mylaps scoring and timing I think this would be a good way to promote 1 new and true class of run what you brung to our large sprint racing tracks here in Colorado.