'Way back when', I put an Accel FE starter in my Effie. I later discovered that what was sold as an Accel starter was simply a cheap re-brush and commutator clean-up with a coat of yellow paint. In order to get it to fit with my '64 427 long iron manifolds, it ultimately was necessary to take the now rebuilt starter, with a re-wound armature and new field coils, remove both the nuts on the side-stud, put the properly insulated battery cable end---double aught welding cable---on the stud and cinch it down with only one nut. I cut the stud off just past that single nut. That gave me enough space between the stud and the manifold to be alright, although I did retain the the chunk of sheet Teflon in what open space there was left.
That worked for me.
KS