I would like to thank John Deere for making that process as painless as possible.
For my first problem, the chimney. I was always under the impression it was about 23' tall but I measured it last night and discovered it to be 18.5' from the thimble to the top of it. It has a square 8" clay tile flue, is exposed and the thimble is 5' from the floor and is 6" clay tile. I don't think that is enough chimney for this beast, what say you all?
In addition, I have a few 4'X8' sheets of polyisocyanate insulation foiled on both sides. Would that be worth sticking to the chimney to keep some heat in it and would it even make a difference in the draft?
Second, in order to use the "puffbackorator" as recommended by Axeman I have another problem. With the 6" pipe adapter at the top of the Axeman using 6" stovepipe, I can't make a size increase prior to the baro as the thimble is 6". I looked down into the boiler where the stovepipe adapter is to find that the length of pipe delivering the exhaust gas to the stovepipe is in fact 4.75"! Do you think it feasable to neck the adapter to 5" stovepipe and run it that way to the baro and then 6" to the thimble?
This boiler was purchased new in 1981 and the guy ran about a ton of coal through it and shut it down, never to touch it again until I bought it. It looked brand new, the grate still had the welders chalk lines and writing on it even though he left it full of ash and coal. Is there something I should look for that may have degraded? Can I reuse the fan housing gasket which looks great?
Any tips or recommendations will be appreciated.
I realize I will have to fitted with a TuTu before pulling the old hand fired and lighting this monster, I just don't want to embarass myself in the process.

A cigarette maybe, I light a cigar in this house and the witches will cast a spell on me.