I bought a vapor separator from 521 Restorations last year. Supposedly his are suppose to be correct. Correct length of tubes inside. I haven't installed it yet. There is a thread on FBBO about this same subject.
https://www.forbbodiesonly.com/moparforum/threads/fuel-vapor-separator.236061/

[img]http://www.imgur.com/hxlGUJt.gif[/img]
4-speed
3:54 Dana
13.01 @107.93 with street tires (not hooking up)