For sprints there already is a class (or even classes if you include non original engined Elise {which you should of course}) . . . and all sprints/hillclimbs support it /them . . . you could just take the results from these events and build them into your own championship without really having to have a special class . . . autotests and other thing may be different of course . . .
You'd either be in A8 (everybody apart from tut and the honda mob) or Sports Libre (tut and the honda mob) I think, but the actual entered class is irrelevant if you just take the times from the event (regardless of class) and apply them to a scoring system yourself . . .
On that subject we're trying to get some sprint newbies on track up at Lossie this year on jock7s :
http://www.jock7s.com/forum/viewtopic.php?f=9&t=58
You may have to register to read.
No reason why that is a se7en specific invite at all, just something we were taking about over the weekend at East Fortune . . . anybody welcome.
Fd