Suggestions for muscle car sound muffler without drone

slantsixdan said
Want to eliminate drone? See here and here. Build your drone-killer in accord with the instructions, and run whatever muffler you want.

Calculator for resonator pipe: http://www.diracdelta.co.uk/science/source/q/u/quarter%20wave%20tube/source.html

I would be temped to install these if I could make them fit. They recommend putting them on the tail pipe for maximum effect but there isn't much room around a dart's tail pipes.