Camshaft endfloat

I have installed a new 266 cam in the1275. I went to check endfloat and
had an incredible .108. (Spec calls for .003-.007). Have I left
something out? The Haynes manual says that if this is out of spec,  then
a new endplate is required. If the endplate holds in the cam, what is
the purpose of the retaining plate. My retaining plate is flat on  both
sides. If this is correct, then the endfloat would basically equal the
endplate thickness. Help!