I didn't know Dodge used these. Some of us have added them, I did on my 67 Dart. Examples are Wix 33040 (5/16) and 33041 (3/8) both of which have a 1/4" return port with built in orifice.
!!!HUH!!! Sure enough, NAPA shows a 23054 it has a "90" degree return
http://www.napaonline.com/Catalog/Ca...054_0325435799
These systems WORK. First one I ever saw was on my 70 RR 440 sixpack.