Whats the differences? SB 727 vs BB 727

I am trying to do my first rebuild on my small block 727. I have all my new parts here and ready to go. I tore down the trans tonight to find out i have some serious problems inside. I might have a hookup on some core parts but its a BB 727. Question is, is the only difference in the bell housing bolts. Are the internals the same. I need both clutch retainer assemblies and maybe the stator on the pump.

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