I have the same exhaust system except I have the long tube step headers and Dynomax stainless welded Ultra-Flos. I have a drone in about the same range, but I'd expect mine are actually louder since when I had side exit, I had the super turbos. Maybe I'm just so used to driving a flowmaster super 40 equipped I5 Colorado that it doesn't seem to loud.
My friend has a Chevelle that had one of those blue pumps on it, and it sounded a lot like that. They are just stupid loud. He eventually swapped to an HP series holley pump which is a lot quieter and so far has been more reliable. Given your experience thus far, my friend's experience, and also having seen fuel pumps die constantly on Roadkill, I can't say I regret my decision to do an internal pump. The problem is that you'd need a return system for a tanks inc or aeromotive setup. I have the Aeromotive Phantom in-tank system with the 340 lph pump and the thing is quiet. Light hum when you flip the key on and can't hear it when the engine runs. I think we talked about this on Woodward lol.