Magnum Roller Lifters

Harland Sharp.
I ran them on a set of stage 3 ported magnum cast iron 2.02 R/T heads just fine. 1.7:1 and 1.6:1 at different times with no issues, and I beat on this engine all the time very often seeing 7k rpm for years. Sold it and it's still going as far as I know.