My 340/420 Stroker Build

Here's a question for the experienced ones here. For a given converter rpm, where should torque peak occur relative to that rpm? Seems like you could then back calculate a cam selection that makes good sense. Obviously not the ideal approach but if you're stuck with a given converter that's a pretty significant constraint.
It’s more along the lines in reverse. The converter should be stalled 4/5 hundred above peak torque. Min.
Actual stall flash will be altered as needed for the duties being asked of the car.