Which engine is Cooler?

I'm starting a new project, I just picked up a 67 Dodge D100 shortbed. It's going to be slammed on bags, with 20" wheels, and a rusty body. What engine would you put in it?

1.) New 6.4 HEMI
2.) Viper 8.2L V10
3.) I'm old school, give me a 440