To each their own. I wrestled with what motor to go with, even building a 455, but in the end, I wanted drivability and mileage out of it. I had purchased a Holley HP efi setup as well, but with the issues I had with it on my dad's '65 Mustang, I figured I'd go with the LS swap. If my car had the original motor that might have been a different story, but not much of it was original by the time I got it, so I was less inclined to take it back to that spec.