Re: Th 400
Harold I'll have to go through my library and see where I read that. Now that you mention it, it may have a qualifier like "after this year" or something. TH400s actually went into cars in 1964 but I think Jeep used them in 4WDs first in 1965 with Buick engines so I may be missing part of the facts. I do know that the early TH400s that were mated to AMC engines had a bellhousing adapter. The later ones of course had AMC pattern bellhousings. Pretty sure all the Jeep stuff had an odd output spline count also, now that I think about it. Clearly there's more to my story!
69 Malibu Stock 307, Reverse Manual TH350, 4,500 Stall Edge Converter, 4.56 Spool 35 Spline 12 Bolt
76 C20 VortecPro 496 628HP 655 lb/ft TH400 Edge Converter, 4.10 14 bolt