[Graham]

Are Pioneer bodies included also? Will 22.5 motors be considered and what about flat 6 motors?

Yes I have now added Pioneer car brand to the over 2.0 Litre Event above, I know the Mustang Knotchback did compete in Touring Car competitions, but not sure about the Dodge Charger ? I have not compiled a Car list as yet, but basically any car must have competed in any Global Touring Car competition.

The idea of restricting the choice of motors to 21K rpm is to narrow the motor performance difference between the cars competing between the Revoslots, Slot it, Modified Standard & Procars. As in this proxy I would see all these car Classes racing against each other.... perhaps ?
As always I am open to persuasion at this stage, so I am not totally fixed on this "rpm" issue as yet, kinda hoping to be inspired by the results coming from the current proxy. I will be considering this issue before I set the "Draft rules" in July, but I would like to at least restrict the motor types to S-Bell or Short Can.

I guess your preference from your perspective in the US , is at least to able to use the Predator 22.5K rpm motor ?

The 22.5k motor would be great as well as the Cahoza 21.   NSR 21k motors may offer more or less performance depending on what side your spur or crown gear is on, it may be worth checking.  I only mention use the Slot It flat6 and RS as it would allow for lower centers of gravity for some narrow cars or anglewinder considerations for others.  And they are typically softer than the numbers stated on the can from my experience.  

The Cahoza motors generate too much magnetic downforce unfortunately, so they will not be allowed for our tracks.
But I will look maybe at Kevan's idea of permitting the higher rpm S-Can motors just for the Over 2.0 Litre cars, as it is a more open Event than the other 2.