Lifters are solido, not hidrahulic, and it has a guide. block is modified to allow that guides.
RUles of that competition aren´t like early stock cars, in USA, all the race cars was sold to the people, but here, competition engines are specially worked and none of taht engine/cars has permission to run in the street.
I will try to post some pics of that engines.
cheers,
Mariano