after a few minutes of searching around everything is hydralic or the solid lifter like i have. nothing that is solid with some material removed?

without sounding cheap can i grind some material off in the same area as shown in pre 68 dave's diagram?

thanks, mike

51 3100, 235 purs with T5 swap
54 Belair 305 & 700r4 few more months to go
I'm on a 1950 3100 that needs very little. A true barn find $1000