I have a nice original low mileage AAR Cuda 8 3/4 third member I am getting ready to rebuild to use in my 1971 Cuda since I can't seem to find a correct date coded 71' housing to match my 430 SPD. There are lots of paint daubs and markings I have found but there is one white paint stamp on the pinion barrel up near the yoke I can't figure out. Any help would be greatly appreciated.

Soak it in Evapo-Rust.

Pull it out & photograph every paint detail every 30 minutes or so.

What you come to see may amaze you.

This is after soaking it Evaporust and removing several layers of cheap paint overs to get to it, it was totally un-readable before(see pics below). I don't think it can get clearer, I think it just got applied very sloppy and I just can't make it out.

It looks like a date 10something

and then they stamped an H or and M over it

On the left side.. like this daub.. i have seen a letter with a paint daub many times..

3.91 AAR & 3.91 T/A