A general breakdown, depends on how far you want to go with this, but search ebay for the l92, basically the new version the the lq9...say for the motor and transmission 3k, an upgraded cam 400-500 right? rework the harness for 300-400 as well, unless you buy the 20 dollar book to do it yourself? Fuel pump, lines, ect about 300, and 300 for your crossmember and your motor mounts. Oh, and you can get the kick ### BRP headers (top o the line eh...) for around 700, ceramic coated and work like a dream. I only got mid length, and they work well, but full potential, might as well get the full length.
Sounds easy enough, really it is alot easier to work on, as you can get the EFILive or other programs and do a working scan of the system, watch where your fuel is lean and is too much, I mean, its f**kin bad man, I love it most days, some days not so much, but yeah. What i've got in fuel mileage more than makes up for what I spent doing the swap. That and all the pieces you take off, say you take off the a/c condenser, sell it for 150-200 bucks, the old engine, a few hundred here and there. Again, you'd be amazed, think about this, there are 8-9 second daily driver lsx motor cars weighin in at 4k lbs...example here:
friends car, yes its turbo, conservative tune, this is before a few more mods but jerry's car is the hottness, and yeah, he drives it around on pump gas (best on race gas I believe is 9.3x or somethign like that):
http://mssftw.com/videos/SD-MSS-Cablebandit.wmv
And Dave, stock suspension truck, turbo, best pas has been...10.8x I believe, and this is his work truck, daily driver/hauler of crap truck...and on the weekends he beats the #### outta it:
http://mssftw.com/videos/SD-quicksilverado-11-35-sdr-9-4-09.wmv