I have a friend who used the Schumacher adapter mounts to put his 1966 Street 426 Hemi into a 1963 Dodge V8 K member in his B body instead of using the front motor plate, standard TTI B body Hemi headers wouldn't fit in it with those mounts down work
TTI does make a special set of Hemi headers for those mounts but why spend more on the adapter mounts and have to buy special headers work
BTW, did I mention I like and use both elephant ears and front motor plates, especially with gen 2 Hemi motors in any Mopar body types up

Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)