Wheelbase remained the same 108" for the Dodge Demon/Dart Sport and Plymouth Duster from their inception in 1970 until their last hurrah in 1976. The Dart Sport even got an extended "beaker" nose in it's last few years, so it ain't that. Dimensionally, the engine bays remained unchanged from '67-'76, which begs the question: Just how thick is this "cheap knockoff aluminum radiator"? I've got more than 5" between the radiator and the nose of the water pump on my all-original '75, and the radiator is ~2" thick. Something's not adding up, unless you've got a 4 1/2" thick radiator in there.
