Need confirmation on some exhaust questions...
Also thinking of changing to 3.73 rear gear form 2.73... any naysayers? It's a DD so I don't wanna go 4.10. Not sure how much gas milage I'll be losing with the 3.73 over a 3.4?... Also grateful for any comments on this! Thx
+1 on all of it.
You definitely will need a different y-pipe with or without cats. The 2.73 to 3.73 is a big jump. I would say try the 3.42's first as well and if you really wanted a little more you could throw in a 3.73. 

