I didn't say step inside ,I just questioned you saying throwing the hook would leave him open for the counter hook it wouldn't. Cooney would be off to the side when throwing his left taking him further away from Galento's hook. Your statement only makes sense if Cooney would be throwing the right hand.
Foreman said, after their fight ,"Cooney is my brother in power". Galento was stopped by the three biggest punchers he faced, and very ordinary fighters not only went the distance with him, but often beat him.