Computer issues with upgrading cam and bore?
 

I recently destroyed my 5.7 hemi in my 300c and am about to install a new one from a junkyard. While I have the engine out, I obviosly want to make it more badass before I put it in. I want to upgrade the cam and bore it out or even stroke it. However I don't have the tools or the expertise to modify the ECMs programming, will changing the specs of the engine throw the computer off too much?
-Andy