what muffler for my 70 LTD?? Help

[Bandido]

I have a 1970 LTD with a 390 in it. When I bought it, it had a new exhaust under with "i Don't know" mufflers. Was pretty quiet though. So I thought, let's try glasspacks to see how it sounds.
Well, sound good, but I got a reall loud humming and vibration around 950-1200rpm!!! very annoying.

So now I am trying to figure out, is it because I cut the pipes before the rear axle and they don't go all the way to the back anymore. Or is it the muffler? What kind of muffler should I get? I don't want expensive ones, I was looking maybe Dynomax turbos or something like that. But I am afraid, they would be to quiet again, too??

any ideas?

 

[Bandido]

come on, nobody?

 

[SVO]

Just some regualar "Turbo Mufflers" will be just fine, but put tail pipes on them, as that's where most of the reverbiation is coming from.

 

[Bandido]

thanks, that is just what I wanted to know!!