casting number location

[ddettloff]

looking for the casting number on a 67 A 833 4 speed for the bellhousing.
The dustcover has been lost and need to replace brewers shows multiple casting numbers cannot seem to locate the number on mine to get a replacement ordered.

 

[Daves69]

http://www.bigblockdart.com/techpages/4sptech.shtml

I think they are on lower right rear face of the housing.