I was on here a couple weeks back, we talked a bit. The way I wanted to do it would result in frost in the attic, most likely.
walls: Post and beam frame, plaster/lath, air space, sheating boards, tar paper, original claps, insulative foil blanket, asbestos tile exterior.
My understanding is that dense packing the walls removes most worry about vapor migration (no vapor barrier behind plaster, of course)? Then, would frame in 2nd floor WITH vapor barrier, sheetrock, and also dense pack THOSE walls, with loose pack on new ceiling ("attic floor"). Gable vents. So, continuous dense pack sill to attic...
I know i have to improve my under-house stuff...partial concrete, but crawlspace area that needs poly. Fieldstone foundation is spray foamed. I can get it *good*, but not 30%, LOL! I had a 1989 home w/crawl, and it was consistently 50% under there, with no harm. I am not opposed to keeping a dehumidifier down there set to 60%...