How hard would it be to fit 295/50/15's?

[ToastToAlmost]

Hey guys, I've been looking into getting some tires for the rear of my cuda and I saw some 295/50/15's that I like but I'm not sure how hard it would be to get them to fit...

I've heard about the spring offset kit some people use. Does that affect the car's handling at all? Where would I go to learn more about it?

I just don't wanna do any major modifications or do anything that's gonna sacrifice the car's handling. If it's too hard to get the 295's to work what's the biggest tire I could fit on the cuda with 15in wheels and no modifications?

Thanks for reading, really appreciate the input.