will a 550 engine fit into a '96 buick century?

[Kris Brown]

I am currently tricking out my 1996 Buick Century to the point where its going to look nothing like nor act no where near like a Buick Century. I'm doing work on the body and stripping the whole interior out of her, but I cant decide on the new engine I want in it because I don't know if the 550 patriot performance will fit into my car. I was told that a 450 would fit into it, but again I don't know enough about engines to know what will fit in my car. Thanks for your time.