4 speed transmission for plymouth valiant

Do you have a dual pattern bellhousing? Most of the three speed bells did not have the 4 speed pattern. And the vast majority of bellhousings you can find today are for the OD 4 speed. It has the large input retainer. A standard 4 speed should have a smaller retainer and it wont work in the OD bell without a special ring to make up the extra diameter.