For our vehicles, converter selection is as important (and sometimes) as difficult as cam selection. Which is compounded by a lack of particular cores. I have been through this a couple of times now.

If you want a loose converter...no problem. But if you want a fairly tight streetable converter for our BB stroker motors......that is a real challenge.

I would like to have a tighter converter in my Cuda, but the cores just aren't available to get there.

You know your combo. Now think about what you want the converter to do and call some converter builders with your specs and preferences. The reputable converter guys will tell you what is and what isn't possible.