@does200 posted:Interesting replies, thanks. I'm just not sure what is in my engine builds, I bought the cars with a 427 Fontana and the other 417.
Jan, you might be able to figure out the type of lifters (solid or hydraulic) and the type of cam without pulling the intake manifold on the engines. Take a valve cover off and try to wiggle each of the eight rockers up and down. Four or five will be unloaded (on the cam base, not the lobe). If the lifters are solid then you will feel the .020" valve lash (gap) on the unloaded valves. If there is no gap on any of the lifters then it is a hydraulic setup.
Determining if the setup is roller or flat tappet is more involved. Take off one of the rockers and then take out its pushrod as well. Use a flashlight to look down the pushrod bore. Or better yet use a borescope since they are now cheap, as low as $20. If it is a roller setup you will see the retaining system for lifters (either bars on lifter pairs or a big spider clamp with dog bone retainers on the lifters). If you don't see a retaining system for the lifters then it is flat tappet. When you reinstall the pushrod and rocker, that valve will have to be adjusted.