Internet seems to suggest that all lifters need to be measured and verified today. Cams also, but the cams appear to be less of a problem. The more I read and watch about cam and lifter failures the less I think the oils are the issue, especially if your cam is not crazy big.

The majority of the cam companies claiming to be selling USA made lifters appear to be selling Johnson brand lifters, and not the Hylift Johnson made ones. Doing some reading on a Pontiac site a few days ago about cam and lifter failures and the guy who owns Jones Racing Cams told everyone that the Hylift made ones are the preferred ones to get.