Long valves on W2's with .600 lift?

The oil filter recess cover plate needs the holes through it to have at least the area near that of a 1/2" single hole and they do not.
Drill the holes in a 6 hole plate to 5/16" or add 4 more 9/32" holes holes to a 4 hole plate; 8 holes total.

Maybe drill a small .031" hole in the rear oil gallery plug in front of the distributor gear for positive oil to the gear. {Krooser- I usually did something like this}
These users liked this post by: Walter R. Malik