The # stamped into it will tell you if it is a Hemi , the drums have more clutches in them , I don`t know of any one producing drums with the extra room though , rumor has it that you can mill the groove out & install an extra clutch in the drums though , most of the rest of the parts are the same execpt for the planetaries with more pinions , I cannot remember if the had a 5 pinion planetary or not
