"Is there a crossover pipe incorporated in the system? "

No, I decided against it. I have had a crossover pipe in my hot rods before and they tend to quiet the exhaust pipe noise. My TBird is more hot rod than country club chariot.  The Magnaflows have a mellow bark that I like.  Kind of like a 60s Shelby Mustang.  They are most likely too noisy for your average small TBird owner.  They sound perfect to me.

Phil, it sounds like you know what you like. There was a time when I would have preferred the noise, but no longer. For me, I prefer quiet/w least amount of flow restriction. I'm hoping I can live with 2 1/4 BorlaProXS mufflers, 1 1/2-inch crossover, and Borla 2 1/4 resonators behind Sanderson ceramic-coated Tbird headers. Borla suggested using 4 mufflers. The resonators, which I have, are more expensive than the mufflers. 

Glad to hear you are happy with the relocation of the mufflers. I think you will appreciate it even more on any long drives with the car. In the stock location, the heat generated off the floor was crazy.

       A  L  A  N   F  R  A  K  E  S   ~  Tulsa, OK    

I have also heard that the application of the crossover pipe tends to cancel out the unique sound of the Y block! Sorry, but I couldn't live with this thought! haha.

       A  L  A  N   F  R  A  K  E  S   ~  Tulsa, OK