Your correct the 833 for the Mopars does have a different bell mount. What I used was from a 82-87 Chev truck that was installed under the RPO MY6, that why it is also called a MY6. The biggest problem was finding a shifter for it, since I didn't get the oem Hurst that came with it. In my 63 the shifter came up left center, 4-6 in front of the seat. To confuse things GM made a bell housing with the Mopar bolt pattern on it, they are very rare. I've seen two of the dual bolt pattern bells on that auction site in the last 4-5 years.
Forgot to mention you need a bell from a 68-72 truck or machine your bell out to 5 1/6(?) for input bearing retainer. The 833 input bearing retainer is the same size as the sm465.
Larry
Last edited by LGriffin; 12/29/2007 11:16 PM.