Mike.
That is probably the Al Moss rear crank seal conversion assembly. There are instructions for the part listed on the Moss website
http://www.mossmotors.com/Shop/ViewProducts.aspx?PlateIndexID=42850&SortOrder=1
New seals are available for the conversion under part number: 433-422
all the best
Kelvin Dodd
Global Sourcing Engineer
Moss Motors, Ltd.
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