The MAF is clean. No Goo. Not sure I'd call it butchered but if you say so. Only off road. One of the headers broke and a replacement was installed a while back. No leaks in the exhaust system and O2 sensors are connected. The motor ran great for years with it's existing configuration. It only recently had issues after being stored for six months. I think I'll just start testing all the sensors one by one and go from there. Thanks for the helpful input.