Engine swap in 07 silverado.
 

Hello, I am thinking of swapping out the engine in my 07 silverado 1509. Currently it has a 4.8 with an auto. I am thinking either http://www.crateenginedepot.com/LS376525-Connect-and-Cruise-wManual-Transmission-CPSLS3765256LMAN-P51460C1079.aspx
Or
http://www.crateenginedepot.com/LSA-62L-Connect-Cruise-2WD-System-wManual-Transmission-CPSLSA6LMAN-P51457C1079.aspxhttp://www.crateenginedepot.com/LSA-62L-Connect-Cruise-2WD-System-wManual-Transmission-CPSLSA6LMAN-P51457C1079.aspx
Would either of these fit in the truck, also, would I come out money ahead to track the parts down from the salvage yard and piece it together? Thanks.