Converted my Brinkman smokin pit side fire box charcoal smoker to propane with the set up from gassmokers.com, it's great, it fits right in there, only mod I had to do was to cut a slot in the firebox door and upper lip to allow the gas line to run outside the box. This is great, I can come home from work, lite the grill, set the temp, put in my can of wood for smoke and be smoking in 20 minutes, leave alone, have a few cold ones and ready to eat in hour or so, to smoke some steaks and fish. On longer smokes, lite it, set it, start smoke and chill, only need to add more smoke wood every 2 hours or so depending how much smoke flavor you want.
Thanks to this thread for the info of that web site.
I'll get some updated pics of my smoker to post.
I did the horizontal mods, extentended smoke chamber tube, tuning plate, heat plates, thermometers etc. when I first got the smoker. It's nice, set it and not worry of temperatures, just a turn of a knob will do it.