I don't have a problem with engine swaps. A friend and I were Mopar people, but he had a 68 Merc Cougar "roller". So we did a 440/727 install as we had the parts.
I had a 49 Merc, with a 303 Olds engine. A 54 Stude with a Packard engine. 34 Ford with a Caddy engine. Several others that had engine swaps within the "family", but not available from the factory. Back in the day that was called "Hot Rodding".