Jeff, There are two different bolt circle sizes available on the OD. Neither one will accommodate the 4.35 retainer as far as I remember due to the size of the bearing itself. You may be able to find a 4.80 retainer that will fit your OD trans(or have the OD retainer cut down to 4.80, as I have done in the past). Then you'd still need to have the bellhousing opened up to the 4.80 size to match. There isn't enough room to go all the way up to 5.09 size of the OD trans, I think. If you go to 4.80 on the bellhousing and blow the OD unit up, you can still go back to the 4.35 unit using a spacer available from Lakewood. A friend of mine and I tried to go through all the possible combinations using over a dozen different transmissions of all years and sizes. I can't remember all the variations we found. Mark ----- Original Message ----- From: "Jeff Adams" <ledman_70@xxxxxxxxxxx> To: 1962to1965mopars@xxxxxxxxxx Sent: Friday, August 21, 2009 5:41:24 PM GMT -05:00 US/Canada Eastern Subject: A833 bearing retainers Hey guys, I'm gettng ready to put an 833 OD into my 64 Polara to replace the 833 already in there, which I think has the 4.3" retainer. What I'd like to know is if the bolt circle on the OD trans bearing retainer, which I think is 5.25", is the same as the bc on the 4.3" retainer. If not, how hard would it be to drill/tap the front of the OD trans to fit the 4.3" retainer? If I can't do that, then I'll have to have the bell housing machined to fit the big br, and that would keep me from being able to go back to the small br if I blow up the OD trans. Confused now?? I am! Jeff Adams 64 Polara ---- Please address private mail -- mail of interest to only one person -- directly to that person. I.e., send parts/car transactions and negotiations as well as other personal messages only to the intended recipient, not to the Clubhouse public address. This practice will protect your privacy, reduce the total volume of mail and fine tune the content signal to Mopar topic. Thanks! '62 to '65 Mopar Clubhouse Discussion Guidelines: http://www.1962to1965mopar.ornocar.org/mletiq.html. [Non-text portions of this message have been removed] ---- Please address private mail -- mail of interest to only one person -- directly to that person. I.e., send parts/car transactions and negotiations as well as other personal messages only to the intended recipient, not to the Clubhouse public address. This practice will protect your privacy, reduce the total volume of mail and fine tune the content signal to Mopar topic. Thanks! '62 to '65 Mopar Clubhouse Discussion Guidelines: http://www.1962to1965mopar.ornocar.org/mletiq.html.