a833od behind 383

That casting number of 2892482 is a small block bellhousing with the small 3.354 bearing retainer, it wont fit the 383, or the OD trans, you will need a bell with casting number 2468372, and have the opening for the bearing retainer opened up to the size of the bearing retainer on your trans. You will have no problem getting rid of the bell housing you have now if you want to.