[West Texas Z]

This is a really bad picture but I made this in 5mins. lol..... Perhaps you could cut and "box in" a filler line compartment behind the tail light that would allow a clean flow and you could angle a cap like the pic lakeroadster provided? Of course my picture was much bigger than needed and on the wrong side but you get the idea.....Plus once you ryno line the bed it'll look stock. Just an idea.