Rolltide....
You say your V-8 Tbird droned alot, but you never mentioned whether or not YOU, YOURSELF liked the way it sounded!! Or is it only what you wife thinks about it? Like I saw posted before, if you don't want drone, or whatever the phenonmen some describe as undesireable, then you better just keep your stock exhaust!! Any aftermarket exhaust that flows better than stock crap will "drone" to some degree, and that is the plain truth. You never did reply to the PM you sent me and I replied to, and I think that this post is word for word the same as you PM to me!
This is not a wife bashing session here, but who's car is it? Yours or hers? Does she drive it every day, or is she the type that gets "embarrased" to ride in a loud car because it attracts attention?
I think that all of the suggestions in response to your query are good ones, but the truth remains, you want no "drone", stay stock, and save some $$ for new head gasket because that is what the stock system does, it is like a huge bottleneck!!
The suggestion I would pay most attention to is the one about where the exhaust exits. If the tips are turned down, the sound pulses will be aimed at the ground right below the trunk, acting like a huge echo chamber. Maybe a good alternative for those worried about the "drone" would be to cut a couple holes in the rear bumper cover and shoot some stainless pipes out the back!
I saw this same effect with the 5.0 Mustangs of the 87-93 variety. The GT's exhaust was turned down at the end of the tailpipes, and was louder in the car than the LX's because the LX's had the awesome stainless tips pointing straight back out of the back. I have had both GT and LX models, and I liked the LX 5.0 the best, not really because it was alot quieter, but you could hear what the exhaust truly sounded like and not alot of bassy reverberation.
Oh well, I guess it is all up to you my man!!
Good luck,
Phil