Thanks! More to come...

I was disassembling and checking the lifters and I found that some are different. The short one measures 1.850" and the tall one measures 1.90". As you can see, they are completely different looking from the side. I looked at the ones on Summit and they don't give a height spec, only diameter (.904"). I measured the plunger height and they are exactly the same measurement from the base of the lifter to where the push rod sits. The oil hole height is .050" different, but since it goes up and down in the bore, it shouldn't matter. The tall one is stamped "Johnson HT 2011" which I found on Summit and application is for this (and many other) motors and are sold separately. Maybe he was missing a few and just got replacements.

In any case, I think I'll order new ones to be safe. I really don't like the looks of the Johnson ones. They look very crude overall...