Dont want to do it for coal rolling for several reasons.
1. Dumb
2. EPA issues fines @$10,000 a pop for each rule broken- my friend in Utah (no emmisions even in his area) goes to court next month for his $20,000 fine and to see if he will ever get his truck back.
3. Dumb
4.All the soot is hell on engine interior and exhaust along with sky high egts.
5. Did I mention dumb?