Bark too much for bite! Which Muffler?

Yes, you do need to take the exhaust out the back. That alone would
help. If the mufflers are the orignal 40's, they are alot louder then the
newer 40 series deltaflows. Try installing some tail pipes first then go
from there. I have the delta flows on the Duster with no problems.
How did we do it back in the 70's with just headers and header muffs.
I guess I'm getting old. LOL!