That wouldn't be a difficult conversion- - - -just use an ACME thread jackscrew and an air impact wrench to press an undersized sleeve into the bore. Getting one machined that would shrink to the right diameter when pressed into place would take a little tinkering to avoid having to bore or hone the sleeve after installation would be the tricky part. On hydraulic lifter blocks, the position of the cross hole would be critical. A dingleberry hone like one for brake cylinders could be used to do the final fitting for a good slip fit with minimal wobble.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!