[Gav]

Dimis,
I think you are getting club racing confused with your ballet guild.
The reason that there are classes is to try to group up similar performance cars/drivers.
A cobra has no downforce so tyres and engines are the main variable.
All that is being said here is that a line has been drawn to separate a large class, but that line has been run through a group of similar cars. This group just happens to be a very competitive engine group.
No class cut off should be so close to a popular engine displacement, if one of the 'just under 6ltr' guys requires a 10 or 20 over bore they will change classes and that is plain silly.

Myself?
I have a modified 5.7 LS1 and would prefer to go in class 3 with the racers than stay in class 2 with the trophy hunters.