Yours, a friends, or one you'd love to put in your car. My all-time favorite is the 331 in Jim Busbys' deuce fiver.
I have an old engine swapping book from 1960. They drop a Caddy 331 into a shoebox Ford and make it look easy, even hooking it up to the stock Ford 3 speed trans. I’d like to do that with my ‘50 coupe some day if the flathead ever gives up.