pretty straight forward. you will have to cut out the stock cat-back, or lower the rear axle for clearance to remove it. the biggest pita was that the damn tranny stayed hot the entire time we were working, so disconnecting and reconnecting the O2 sensors became a bitch. get some PB Blaster to use on the exhaust manifold studs. let it soak for a good 20-30 minutes to do its job, then take those fuggers off. good luck! and yeah, the computer will adjust.
oh yeah, disconnect the battery before doing anything else.
one more thing, for the passenger side manifold nuts, you will need a few extensions and a 3/8" drive swivel/universal, and a medium-deep well socket. i fotget what size,....want to say 15mm