Stop in for a cup of coffee

Mattax said
That also plays into it. I completely agree.
Gas flow is "King" but that's not to entirely discount where the disruptions or changes in flow take place. Located correctly the harmonics can help or hurt in critical rpm ranges.

That was part of the reason I went with the Flowmaster 40 baffled chambers vice flow through muffler.

Loooooonnngggg range thought is to eventually slide a 273 into the car but my primary purpose is to get it driving and enjoy it. No garage queens