If this is for a show car where you're looking to have something unique, and kickass, but easily serviceable, I'm gonna say again, stick a big, greasy Cummins in there and go for attention, lol. It's a one wire motor, so all the shop time is spent on motor mounts, driveline fitting, etc.
If you are fine with undersized but highly economical, you could look into doing a VW TDI swap as well, LOTS of room left over in that engine bay, and they can make pretty decent power with some mods. And widely available.
If you are fine with undersized but highly economical, you could look into doing a VW TDI swap as well, LOTS of room left over in that engine bay, and they can make pretty decent power with some mods. And widely available.