I agree with cruzin about running lean and doing damage. I have always logged and have my dashdag set to trigger a warning when it hits a specific afr so I know to get out of it. I am going to change my plugs since I feel it is possible that all of the abuse has caused tihem to age prematurely. If not for the cost I would consider going to a 178 pulley and before it is over with I may do it. I would really like to make this work though. I have the lean issue under control my AFR's on wed never went above 11.8 and dropped into the low 10's after each shift. Now I just need to start slowly pulling fuel back to get into the 12.5 range and I will be happy.