Deffinetly putting the wide band at the top of the list. I'm sure it's not ideal right now... assuming I'm running a little rich, based on what I've been told by a couple others on here with the same set up. The worst I could do is foul some plugs or dirty up my cat. Plugs are Safari NGK spec'd, rather than stock, also run premium fuel per instruction. As far as timing I don't see a big issue. "Scary" Get's me a little scared!You need to buy and install a wideband gauge. Aem uego brand new are like $160.
Then you can determine your course of action. There is no way your AFRs are "ideal" for your setup. They may even be on the verge of scary. Same with timing. That fuel and timing controller I posted would be the "cheapest" option for a really quality way of tuning your truck perfectly.