Pretty sure I had them on my old Hemi car - full 2.5" system, modified the tips to take 2.5" in - and they were crisp, fairly loud @ full throttle.
That car sounded great, and like it meant business.
Have them on my '68 383 car, otherwise stock system, no tips (base model RR), much quieter no matter what.
The 383 has less CR (9.5 vs the Hemi's 10.8), which does flatten the tone, so to speak, not as crisp-sounding.
My '69, with more CR (actual NHRA spec) but replacement stock system with tips, and a slightly bigger cam than the '68, sounds great, more like my Hemi car.
Tailpipe size matters for decibels, as you likely know; and '68-'70 cars with the factory tips always sound better to me.

You might try the straight through "turbo" mufflers - sounded good on Engine Masters, and IIRC, less loss in HP than the U-turn architecture.
I don't recall if they have a welded case instead of the stock or stock-ish crimped style.