Muffler Advice

That's funny Tom, I was writing as you were answering.
I do have a question for you, What are your feeling about
the article I sited in my original post?
The author is David Vissard.
Is it correct or has new information been discovered.
I'm not totally naïve to pipe flows as I am a high pressure boiler
operator and repairman licensed for 32 yrs.

My system is Hooker Super Comps into full 2 1/2" mandrel bent pipes.
It has a 2 1/2" H pipe.
The motor is a 450 hp 360cid capable of 7000 +rpm.
I'd guess my questions are where is the most optimal
placement of the H pipe and how do I judge a muffler
that flows as well as the pipes and keep exhaust gas speeds up.