First I don't much about the different rear axles, 12 bolt, 14 bolt,etc.
I was told by someone at a swap meet last weekend that they had put an Eaton pumpkin in a 14 bolt rear axle. The only problem they had was to swap the axles because of the splines. If the reverse could be done, 14 bolt pumpkin in an Eaton rear axle, that would make more rear axle ratios available for the Eaton.
Larry