I have a '68 911, Normal, soft-window targa, and trans type 901/74, s/n 9284103. On refurb, internals were noted:
Nurburgring gear set, LSD and 904 main shaft.

But the 901/74 notation from the COA doesn't correspond to anything in current documentation.
Can anybody shed some light here? Grateful for any guidance.

Existing thread from 2014 is linked here:
http://www.early911sregistry.org/for...g-to-find-info

Had an interesting email exchange with Richard Casto at Blue Sky, but netted nothing definitive:
http://www.blueskymotorsports.com/in...id=17&Itemid=6