I am eventually thinking of buying the LT4 conversion package.

Is the package a good deal along with a good help to my engine. Also, will it hurt my gas milage alot or will it mildely hurt it.

 

You might want to try the "search" freature.... I know there are currently active threads discussing the LT4 conversion and people's experience with it. And there have been numerous threads in the past that will contain some helpful info.