You need to contact dieseldummy from the 6.2 forum. He ha rebuilt DB2s. The right way to do it is to have the machine that calibrates them and so forth. No one here has been brave enough to overhaul and strap it on their beloved IDI, but if the G guys can do it why not us? Just understand what you are risking 1) It won't work at all....trashed core, money down the drain....probability significant, but unknown 2) Do it mostly right but it bolts on and runs ok, just not quite right, still has core value at some shops(if you don't tell them too much) Probability probably pretty high. 3) It runs great!! just like a rebuild (you were lucky or someone upstairs was smiling on you...or you got a pump that was good, just needed new seals and you were good enough in there not to mess anything up, probability unknown 4) You fir up your truck and it lurches toward the governor...scares the hell out of you if you can shut the fuel off, scatters the truck if you can't(probability unknown, but very real) Really, Justin, aka Dieseldummy was very helpful. He has no commercial interest in DB2s and won't me with anybody else's but he'll tell you what he did...very clever, probably beats the heck out of some of the bad "rebuild" shops nowhere close to the best ones. It works well for his "hot" 6.2 app.