Slant six dual exhaust vs. 2-1?

I’ll enter this posting about duals or wye to large single to basically and efficiently build the exhaust system. For many years now I have used a real dual exhaust system on my 70 Slant6 Dodge. I installed a set of Hooker headers on my engine over 20 years ago. From the 3 into 1 collectors I had a 2.25” aluminized real dual exhaust system with “H” pipe installed just down from the collectors. Then down to twin 26” glass pack mufflers then all the way out to the back ending just under the rear valance. Seems to sound nice.