Quote Originally Posted by Poil336 View Post
all in the tune. keep in mind, air temps are getting colder quicker this time of year and gas stations are switching to winter blend gas. a stock pcm isn't going to be able to compensate right with the added air flow from your mods. probably just going lean under load leading to the kr you're seeing
This was kind of what I was thinking, even though I'm new to the tuning scene. I figure, with more than enough flow for a 3.4, let alone a 3.5, my AFR should probably be my main concern. My only worry is that, in the process of tuning for a 3.5, I'll have to cut too much timing, or have a silly rich AFR.

Is there a problem to having AFR that's a bit on the high side just for WOT and "normal" AFR for the rest of my driving? I'm one to only floor it a few times a week, otherwise I drive quite sanely.