New hammer what will it run?

Decided to make a new set of headers.
Old headers was something I fabbed up quick to get at the time my 18 year old drag racing.They was old 1 3/4" hookers 5204 I believe.After pulling them off this winter I'm realizing how bad they are.One header is 4" longer than the other and so on.Any how I fabbed up some new ones that are bigger,straighter radius out of head and same length.I will say it sound wicked but I'm thinking it was because of the f'd up headers
Old headers 1 3/4×3" with 3" race dynomax mufflers
New 1 7/8"×3 1/2" open
I started it up the other day and it sounds like a different vehicle.So much smoother.

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How long are your primary tubes?