I guess your rules over there for breathing the engine are different then they are here in the States with regards to blower motors
Have you looked at Murphy's NT/F car lately Bruce?
Roo
He is the only one doing it that way and (without going all over the country and looking at everyones car) the hose to the capture devise is 1 1/4 " ID as mandated by the fuel rules, All other classes must have a hose/hoses that are 1" ID and is not the case here. Since the car is not finnished yet, I would assume that the tower breathers on the valve covers will be blocked off and not vented.
On the Highspeed dragster we run a -10 from the valley cover and 1 1/4" hose from each of the valve covers