I've never had tailpipes on any Mopar I've ever owned, but I sure wish they had them. I don't even have them on my new street car but hope to soon.
I've always used turndowns at the rearend, but turn them mostly sideways, I've never had any complaints of kicking up dust but I'm pretty much always on concrete.

1970 Challenger, all aluminum 528 Hemi, HDK suspension, Tremec 5 speed manual