Long time ago a guy got tired of his slow Porsche 912 (911 with a 4 cylinder, IIRC) so swapped a 455 and auto tranny out of an Olds Tornado in the back. It encroached on the back seat so he built an engine cover out of old suitcases srewed together and gutted so there was no way to tell by looking. What a sleeper!
"the 455 encroached on the back seat area" - I had a friend whose dad had one new back in the day. I can't remember how old I was maybe 8-10 yrs old and was always the smallest kid in class but I remember how uncomfortable and small it was even for me. To say a 455 and tranny from a tornado "encroached" on the back shelf is a misnomer as I would imagine that it ate up every inch of that shelf. It didn't have enough to it to be called a seat imo.