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I am starting this thread to document the addition of emissions components to my '87 Comanche. As I noted here: http://comancheclub.com/topic/36615-mil-warnings/#entry366926, my Comanche, which had a '99 Comanche 4.0L swapped in, was throwing an error code P0443. When I went deeper, it appeared that the entire swap was done sans emissions components. In the picture below, you will notice there is no purge solenoid. We went to the Pic-N-Pull and pulled the following emissions components from a '98 Cherokee: Pictured above are the hoses running from the tank to the evap canister, from the evap canister to the purge solenoid, and from the evap canister to the capped tube. (I think that in some models, the capped tube actually connects to leak detection pump.) We also pulled the evap canister, which is the square thing, and the purge solenoid, which is the smaller cylinder down and to the right of the evap canister. I took the following picture of the emissions sticker from the '98 Cherokee we were cannibalizing: We will be working on the installation tomorrow, and I will update this thread then.