Bit of an update. Exhaust is complete. Noticed the scan tool indicated the O2 sensors were not sending a signal. I removed the O2 sensors to clean them up a little. Heavy carbon. After I reinstalled them and ran the truck, it was a little better. I took a closer Look and noticed the ones I had (tip was rounded with what appeared were small slots in the tip) were different than the more squared off tips which have small holes in them. I purchased ac deco O2 sensors (more squared tip) and installed them. Truck ran much better. I still have the multiple engine misfire code, knock sensor one low voltage and 0650 mil. I also now hear a distinct ticking noise (electrical) noise coming from the coil injector area. Also, truck is very sluggish when I drive it. Most likely due to the Aforementioed codes. Thanks to everyone who has responded. Gonna keep looking.