T5 Five speed slant six 74 Dart Sport.

Well, I do have a spare flywheel, so that isn't a problem. But I don't know about shimming the fork pivot. I don't remember what it looks like exactly, but the fork has a piece of spring steel on it that snaps into a pedestal in the bellhousing. I don't remember if this pedestal is removable or not. I should have my new to me '53 Plymouth road ready by the end of the week. I guess I'll pull this apart then and find out.
If its the same for a regular bellhousing as an OD one, the fork pivot pedestal bolts to the bellhousing and is easy to remove. I can get you pictures tomorrow of the deal if it will help.