I didn't know of a long-crank and short crank of the 6.0's. My new block came with a 99-00 long crank typically out of LQ4's. Which is fine if you plan to run a stock flex plate but wanted to run a little stronger plate. After talking to Brian at Circle D, my options were to have the torque converter machined to fit or go with a JW flex plate from Florida so that's on it's way as well.