Hydraulic roller lifter to solid conversion

We are reversed. I'm right down the road from there. Highland and River Rd. I grew up in St. Charles, MO and went to college in Rolla. I consider Missouri "home". I move to WI for work.

There is a button head cap screw holding a T-shaped retainer in on the back side. I think they are Comp 892C-1
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I've got a couple other projects in front of this one so it might be fall before I get to it.

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I like your lifter idea I have had the same thought about converting my Comp retro SBM hydraulic rollers to solid. So far no help from Comp after several attempts.
I moved to Lake of the Ozarks for work.
I was a Regional Manager for Tecumseh Engine and later a Sales Engineer for Cummins Engine from which I retired from 10 years ago.
Go Chiefs!