Julio's sounds good with the dynomax(am i right here julio you werent 100% sure at the nats last year)
I went with the Hooker catback and really like it on my car.
Also if you order it from Summit get the 83-85 f body kit with the 4 bolt flange it will bolt right on and sells for like $235 vs. the 269 the stock type catback.(remove the adapter and the 4 bolt exhaust bolts dirctly to your cat/ test pipe.
later
Jeremy