Ive been looking on the market to by a 5.3 LS4 engine thats in the Newer models 06-09 SS. i want to put this engine in my 04 LS take out my 3.8 seires 2...What would i have to do? its possible right? would the motor mounts line up right? would it be a straight bolt on? I need a V8 and im going to make it a V8 because i cant stand the dam Dodges and there Hemi's.