Dirt track vent..

Looks to me that a W2 headed 360 would be the hot ticket. On a metric chassis.
Looks to me that a w2 headed mopar that is competitive would be instantly protested for not having 23° heads.
Btw, does anybody here know what the valve angle is on small block ford heads? Google says 45° (LOL). I'm curious if fords are illegal by rule too.