Oh yeah, It's almost like having an upside down six pack scoop underneath with no escape for the wind. The amount of space between the chassis and ground is what??? 24" at best. At least a six pack scoop has open air around itself to escape up top on the hood. I could not find my drawing yesterday, but when I return from Detroit on Monday, I'll look again and post it.
Plus, both 64' and 65' as far as Dodges are concerned share the same rear bumper. It may be a little different on the Plymouth's, but not far apart.