[ron mattson]

On billet or tool steel cams I would run the
dlc lifters with no oil hole as the hole just creates
a place for the dlc to not stick or flake off.
On cast cams I would use the ones with the hole
and have coated with a lubricity coating like
Micro blue, have the cam nitrided and coated also.
And as Bob said Pppc has a dlc that will work
on a cast cam also.