What you are doing is reinforcing ignorance. Carry on. I haven’t called you a name. I just pointed out the flaws in your argument.
If you think that the concept of, as you say in your first post “tuning up the combo” or however you put it includes wholesale changes in cam timing, carbs etc. you need to do that on a dyno.
Then you can make a reasonable and objective choice on converter. I do realize you think the dyno is a waste of time, but it would save you thousands of dollars.
That would require a paradigm shift in your thinking.
And I’d never tell you to use Torco, LAT or any other oil such as those. You don’t build anything that would require it.
So don’t mix in your personal issues.