I am looking to restore the brake booster and master cylinder on my 1970 442. I need help to determine if my part is original.

What is the correct codes for the brake booster and master cylinder? I understand there is a julian date code on the front top tab of the booster but what is the correct code on the back of that tab?

For the master cylinder what is the correct codes that should be found on it? I understand there is a part number and build date under underside. What should it be and are there any other codes that I should check for?

Any information is appreciated. Thanks in advance.

 

would like to verify the codes as well. In the assembly manual, for a 70 power drum it shows TN for the master cylinder and UB for the booster assembly. I assume these are correct….anyone know for sure, if these are the code that should be on the tags?. thanks