I just took my 82 6.2L k5 in for safety and IM and it failed the first time on both safety and IM. Failed safety because of Right front and rear sidemarkers and turn signals. Passed opacity at 50 mph with only 18.2 but failed at W.O.T. with 38.3 and the standard being 35. I was rather bummed on the IM results however I was not going to let a few little things like BLACK SMOKE stop me. So I headed to the nearest parts store, grabbed the sidemarker and turn signal lights, a new air filter and some cheap diesel fuel conditioner (Pyroil I think is what it was called) anyway I throw everything in and run back to the County IM place (which is where i have to go to get diesel im run no one else does it here) praying that it will pass. As he starts the dyno I am thinking "Please, Please, Pass!". After it finished on the dyno and guy told me it passed, I was ecstatic (Border line bouncing off the walls). The results were at 50 mpg the opacity was 2.3, and at W.O.T. it was 4.2. This may seem like a silly story but after being with out my blazer for almost a year(which just by itself is vary painfull because I love it so freaking much) due to various problems and my wife allways telling me to stop spending money on it sell that piece of crap. I am just so freaking happy It is ready to go and that it is running strong had to share with all other diesel guys. DIESEL ROCKS!!!!!!!!!!!!!!!!!!!!!! 1982 6.2L Diesel K5 Blazer, TH700, 31 inch tires. Fire ALWAYS makes it better.