The ford 289 302 351 bell housing is not the same as the 6.9 and 7.3 bell housing. Your only bolt in options are zf5 , zf6, c6, e4od, and aod. But they have to be the diesel versions that originally came with the ford diesels. Not only for bell housing, but for gearing as well. I am currently swapping in a 7.3 into my 1960 F600. Its a dang good motor.