Engine Choices: What interests you the most?

Wanna be really different, makes gobs of power and yet get decent mileage? swap in a tuned up 12 valve cummins..............................................Yeah yeah yeah, thing only weighs 1100+ lbs.....

In all seriousness, I vote 400 with a 440 crank, total cubes 451 inches, aluminum heads, intake, water pump and headers and you're pretty much down to stock small block weight so the balance is pretty good. You can do the same thing to a 440, which i what I'm doing but you're weight 50ish lbs more than the 400. block.