At least some of the "solid" lifters sold these days are simply hydraulics without the internal plunger and valving installed. No problem, as the upper part where the pushrod cup rides is held into place with the same sort of spring clip as the hydraulic lifter has. When I was working as a connecting rod rebuilder at a parts store, one of our customers raised an incredible stink about them selling him a set of those lifters for a Ford engine because they didn't "look" right.

Just run the things- - - -getting anal about appearance is silly! As long as there is a groove to allow oil to flow around the lifter body, the depth of the groove is not an issue.
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!