Torque converter ID needed

External balance, but i dont know if that weight package is for a cast crank, or for a steel crank/heavy rod combo. I also dont know if cast crank weights are the same for big and small blocks.
My opinion only, if that thing really stalls 3000, i doubt i would use it. For a converter that big, to stall 3000 it would have to be pretty sloppy inside. I would rather see an inch or inch and a half smaller/ tighter .