Yes, it will all fit in place of a 5.7 but, at a minimum as said above, you'll need to have a CMR tune done on the PCM (must eliminate EGR, adjust A/F ratio, shut off MDS, etc.). Also, the exhaust is good (but a PITA to install/setup), and the transmission won't support that kind of power, so you'd need a beefed up unit....perhaps a Sheradon Stage III (~$3000). You wouldn't have to do the tranny immediately, but it certainly wouldn't withstand too many WOT runs. If I were to do this, I'd find a junk yard 6.1 (probably Cleveland Pick-A-Part) and build it myself (my way...haven't done this in a long time) for probably a little more than half what they're charging. For sure I'd add the MDS lifters/solenoids and retain the MDS (probably use the same cam I already have in it), and probably also make a custom mount for the EGR (reduces combustion temperatures), so I wouldn't have trouble with the "smog police". I'd leave my tranny alone for now (I've already improved it a little), and then eventually pick up a Stage III. I'd have to cut the flanges off my custom tubular headers and have 6.1 flanges welded on and then re-ceramic coated too. Really would be a fun project though.....my kind of stuff. It only takes $$$, and I've pretty much committed (after 4 years of "improvements") to my wife that I'll quit messing with it now.....at least until I can think of something else to do, LOL!!
06 GCO, Dk Khaki, QDII, Flshing Hi 3rd Bk Lt, MDS "ON" Lt, Airtab Vortex Gens, Debadged, Fumoto Drain Valve, BT Catch Can, Chopped EGR Tube, SRT8 CAI, K&N Filter, Sonnax Trans Line Press Booster, SC Tuner W/Adv Trans Tune App, DS Tuner, Cust tubular hdrs w/3 in Magnaflow/Xlerator AP Exh Sys, Bilsteins, SRT Springs/Sways, Cust Eng Cvr, SRT8 frt/rear bumpers, FRI Sidewinder Cam/6.1 valvetrain, SLP 25% UD Pulley, BBK true 90mm T-Body, SOS Ign Coils w/.060 spark plug gaps, SRT Reps with 265/45&295/40X20's.