Making a Slant 6 look, and sound cool

My current daily driver is a 64 Dart with a stock 170. Exhaust is original with the exception of a 2.5 inch Flowmaster and simple downturn just ahead of the axle. Sounds AWESOME. Nice low rumble at idle, and you get that classic inline 6 wail at highway speeds. I'm not crazy about the way Flowmasters sound on V8's, but it's the best sounding muffler I've ever heard on a 6.