The Gen lll is it's own series alone from big and small blocks. The A and LA will share some parts, same with the B and RB, even the Hemi will share some parts with a B or RB. Other than the bell housing bolt pattern I don't know of any parts the Gen lll share with a small block. :thumbsup:
If we're going to say the bell housing bolt pattern defines what family the engine is, are all Chevy's big or small blocks?