Who would be interested in buying a 5.7 Hemi A Body car?

in missouri a old car doesnt have to pass emissions. I think if its 20 years or older, maybe more. How could a 64 dart pass emissions? A slant six probably puts out more emissions then a 5.7 hemi anyway. The laws are different in each state.
as far as tranmissions, im gonna use the tremec 5 speed. autos are cool for daily drivers and 10 second race cars, but i think my fun car needs some manual shifting.