Purple Hornies exhaust

I have a 74 scamp with a 360 with hooker super competition headers and was thinking about bolting up some purple hornies and being done with it. i just dont know what it will sound like and how it would perform. i have 484 cam, high rise intake,30 over new built engine and several other upgrades besides new heads. if anyone can help me out with some opinions it would be much appreciated thanks again