2200 would be fine. Getting one specifically made for the cam specs and your vehicle is the trick. I have several contacts for converters at performance automatic, and ati.
The converter literally pulls off with a yank in 2 seconds if the engine is out.
You have alot of chefs in the kitchen on the ignition stuff. But for my 2 cents. The OEM type box isn't my favorite. I would go cdi box, or ready to run distributor. If you are "upgrading" your ignition., then still utilizing a mopar box that has the fail point of a ballast resistor isn't much of an upgrade. Imo of course