Going to disagree on this one with Pete. The markings were not created using a stencil
Thought I mentioned that in the article in the Library titled - -
Paint Marks - 64-70 Manual Transmission IF not its in one or more other threads on this site
If you look at enough of them you can see that they did not use stencils but rather a stamp like so many other factory premade markings. The stencil idea got started way back in the 80's likely because the stampings were very poor and worn and areas of paint were missing. If you compare enough you can see that the sections in the paint rarely match up from one example to another while others have no paint missing in those areas. Just basic investigation principles
As for the stamp you have two options or purchase a stamp or go over to the CJ site and if you have already joined do a search and ask who has the GAZ stamp. A number of years ago I made and gave the identification stamps for the different years to the site so they became loans that got passed around. Many members over there purchased their own but the loaners helps out a bunch of members over the years. These programs worked at the sites where there are only a couple of manual transmissions used on all the cars. For this site there are way to many different types and markings
GAZ loaner thread over on the CJ site
https://www.428cobrajet.org/forum/index.php?topic=23135.msg155373#msg155373