1965 plymouth Barracuda 273 commando, switching from 9 1/4 to 10 and 1/2 clutch.

Hi All,
Have a 9 and1/4 " clutch switching to 10 and 1/2". I have the clutch, pilot bearing etc for both set ups. However I do not have the correct bell housing, and I'm not sure what the difference is between 9 and 1/4 to 10 and 1/2 conversion.I am going to CPW fall fling on Saturday. Please if anybody has excact details (and Part #'s )to switch over that would be most appreciated. Part #'s pics , anything. Also pic's of throw out bearings right before the engine installed. Exact P/N, pics and Thanks everyone. Mopar to ya, 3 days away. This is the last MP show of the year. I know you guys can do it !!!!!!
Glenn !!!!!