[Cam]

Converting from solid to hydraulic? I am not sure if you meant that the other way around. Our lifters are hydraulic lash adjusters. They fill with oil.

I would highly suggest keeping this set-up because solid lifters must be adjusted extremely often. To adjust them you have to get to them. This means the engine comes out. Big pain in the butt to do every couple months.

The other popular option are roller lifters but there is simply not enough space in our design to accomodate the roller.