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

Here you go, check out these links asap and all your issues will be solved :cheers:

www.brewersperformance.com

I converted my early-a to the bigger 10.5 clutch set-up. I used a newer aluminum bell and stock flywheel. Everything else I got from Brewers! They make a conversion kit for the early-a and it is well worth the money!! It fit and works like a charm!! Brewers knows all about this and can help you over the phone, it will save you time and money searching for used stuff that you will have to modify to fit anyway..not to mention the frustration...get the kit!

The second link has some info on 833 4-speed info

http://www.slantsix.org/articles/4-speeds/ODA833fourspeed1.htm