6200rpm with a stock weight piston, (3.75 stroke) 6800 rpm with the same stroke and a really light stroker piston like in a 451 /400 lowdeck. I built a 440 with them back in 1975, and it is still running today after seeing bracket racing duty in two cars for four seasons.
The only reason to use them now days is if they are already rebuilt and you know their history, and it is a budget project that will stay within those rpm ranges.