Exaust question

[Dgas56]

I think this is where this should go.
I am in the planning stage of a build. A 1960 Impala sport coupe restomod. The car will be HP BBC powered w an automatic. BUT I want the car to be a quiet cruiser as it is not what anyone would consider a HP muscle car. They are more commonly built as gennies or customs. Not to say there are not HP 60 Impala's far from it, I know of a few. Anyway I want an exaust on this car that will not constrict the exaust flow of a HP BBC Chevy w custom headers (461 CI, 490+ HP), BUT will not rattle the neighbors windows or inside trim. I have used Flowmasters and frankly while they are a great HP muffler they leave a lot to be desired in the noise dept. on a cruiser (This from a guy who used to collect loud exaust tickets and brag about it...) I was thinking 3" w an X crossover. It would be best I believe. . I can get turbo's in 2.5", but 3"???
A mild rumble is what I am after.
Anyone???
photo are Net pics in the same color ext/int combo-the last is the motor going in it, Now has Alum Pro Comp heads, air gap intake and 900 Vac sec Holley