Thanks, but the flexplate teeth are also damaged, so I will need a new flexplate anyways. The new converter has a better lockup discs, and a different stall speed. I need the flexplates.
Dealing with the converter is easier. If its a stock spec six stud converter it will be a little better than the four stud converter. The easy way to make a 4R work with an IDI is use the four stud converter from an E4OD. You can get these in any spec you want. $$$ is the limit.
If you want to use a six stud converter, you might get away with drilling the late stamped style flexplate.