Well Mike let me tell you.
I installed mine with the velocity stack poking on the outside of the cowl.
for the life of me I could not get the engine to run reliably.
It started ok all the way to half throttle, after that it sag like it was lean.
i tried all kinds of needle settings as well as turning the velocity stack in different directions with no luck.
Still the engine would not run steady at past half throttle.
Since I have been running Zenoah engines all my hobby life, I knew that it was not a needle problem.
I removed the stack and now the mouth of the carb sits right behind the cowl opening.
the engine runs steady with no sign of sagging or hesitation.
I come to think that the vacuum that the stack created was too much for the carb to handle at full throttle.
kinda of strange since I have the same set up in my Top Flite p-51 and the G62 runs like a Swiss watch with the velocity stack on.
Anyway before you go ahead and cut the cowl I would consider the carb elbow, if the linkage to the servo does not become an issue.
Otherwise cut a hole and forget about the stack.
just my opinion.
Fabio