Man, am I glad some people are as stupid as I am to want to modify these 3800s.

I've been doing some digging around on the forum, getting my learn on in places like blueguy's 'Safely modding your 3800' and Reptile's 'Octane/KR explained' threads. I'm really grateful for the guys on this forum putting the time in to help newbs like me.

However, I still had a couple questions when it comes to the process of getting my car ready to take a pulley swap. Some of those questions are as follows..

The first one's gonna piss you guys off: Do I really need to upgrade my intake if I don't plan on dropping below a 3.4" pulley?

Sorry, but from all of the discussion about the gains it actually makes...I had to ask. I just don't know a ton about the differences about HAI/CAI systems, and I don't want to install one or the other and realize it was a mistake. Some guys think the difference from the stock setup is negligible to begin with. (I was also concerned about ambient temps, as they vary from -10 to 100+ in Iowa.) What do you guys think?

Second one: Can I upgrade my spark plugs to desired now, or will I have to change them every time I want to drop the pulley? I really just plan on doing everything that's necessary and then going down to a 3.5 or 3.4, I was just curious what you guys thought was best. Not trying to be cheap, just don't want to buy a set or two when I don't have to.

And last but not least...if I throw some headers on, can I call it good on the exhaust?