The only rule is stock .
How you go about it is your own concern .
It's probably one of the fairest rules in Motorsport .
It means the driver wins , not necessarily the drivers wallet ....
I alluded to the 964 carrera rs engines in my post about batch matching .
It's about all you can do .
It makes for the start of a perfect level playing field
You could probably make one hell of a "stock" engine with all your spare parts jake ....
I know there's no money in it , but it would be good for rep points
.