Pick my converter?

Yes, Rusty nailed it. I have been out of the loop on who makes the highest quality replacement converter at the present, hence being overly cautious with selection. I’ve seen too many fresh transmission wrecked by offshore converters, lol! But if you can buy something identical the high stall factory HD converter off the shelf (which IIRC is really close to that 2200 rpm figure), it won’t break the bank and it won’t break either. With a moderate 318 and a.727 with said converter, your drivetrain’s lifespan will be borderline eternal.