You do know that that black smoke is unburned fuel? Just like dollars flying out of Your tailpipe? And it's like a time bomb, without a Pyro.
Another thing. Your black smoke show is just accelerating the possibility of MORE EPA restrictions on these older trucks. If You run around doing smoke shows, it gives the public a very bad impression of diesel pickups. When it comes time for them to vote on things, they remember the day they saw an old Ford truck spewing that obnoxious black cloud.
I, for one, am not looking forward to putting DPF's on My trucks. Especially if it because of Peeps who think they look cool. When, in reality they are making all of these older rigs look bad.