WTB a 1970 drum brake master cylinder AANF marked.

[JH27N0B]

So is it the conclusion of this thread that 1970 power drum brake E-bodies had the AANF master cylinder?

I've never seen any documentation or other data linking any of the 3 casting numbers of this style master cylinder to any specific model years or models.  Other than some having a dust boot bolted to the flange on manual brake application ones, everything else seems the same on these regardless of model year or model.

[GoMangoBoys]

This is what is stamped on mine.  Let me know if it si what you want.