hydraulic and mechanical

Right on Terry. Again, if you have a Hyd. set up, and you want to go mech., go get all new parts to install in one shot. That'll make down time only installation time. The stock length pushrods will work fine for many street grinds. You'll just have to have mech. P-rods.

Now if you have a mech cam set up with adjustable rockers, and you want to go Hyd., then it's just cam, lifters and pushrods *With* the cup end up top for the rocker and ball down at the bottom.

Lifters do not interchange.