Got my Cam Back from Oregon

Re-grinding a cam reduces the base circle, so original p'rods might be too short. The lifters have about 0.150" internal travel [ sometimes more ]. That is, from where the prod cup touches the circlip, there is 0.150" of movement available. The lifter will work anywhere within that 0.150" range. That is why they are made with that adjustability: to allow for a stack o up of tolerances, maintenance such as valve jobs, head milling. Some people try to get the prod cup as close to the circlip as possible; that brings new problems....
We should give Ma credit for getting it right this time....