upg = upgrade, I imagine. did you have to rejet for the ear shave? It seems to be kinda up in the air if you do or not.
Didn't think of that, and didn't see it in the search, makes sense now. Where did the rewind come from?
It's my opinion and experience, that jetting isn't needed until the pipes are changed, regardless of air filter used. I think you are asking me, since I don't see an earshave by the OP. I did not rejet, and the plug color says I didn't need it. Maybe I could be 1/10 sec faster if I jetted, but it's not needed.
Now, using the incorrect pods can block ports at the carb throat. Maybe that has caused people to go for jets, and the jets cover for the blocked ports, so they equate pods to making it lean by themselves. Because if you look around the internet, you'll see strong opinions against pods and people insisting a rejet is mandatory. So it's not just here, and I'm not disrespecting Fergie, I just don't believe it's automatically mandatory except with open exhaust.
I can take the air filter completely off a Chevelle, and not need carb jetting. But if I slap on a set of headers, it's going to run leaner. The Chevelle carb won't have those half-moon ports to muddy the waters.
It's in my signature, stock jets with earshave.