Hii , nice to meet you 86VT500 C
I try to solve the basic problem of air breather exhaust of twin carb VT500 , cause of narrow angle and so super narrow space there.
Here's the basic setup for exhaust /air breather (2 carb) CMIIMW.
Actualy, I used 2 elbow , first for the left carb exhaust ( after market filter)

and the second one for right carb (I used VT750 air filter box but you must customized the box hole)

and the global setup is like this

Hope can help u .thanks