If I understand correctly you are looking to make your own decals and need to known what the markings/stencil data says? If so, Google:
MIL-STD-2161B and MIL-STD-2161A(AS).
The former is the current (2008) USN/USMC aircraft paint marking guide and the latter is the previous version (circa 1993).
You can find usually find them online. Sometimes as free pdf downloads. For example here is a link for one:
commons.wikimedia.org/.../File:MIL-STD-2161A_%28AS%29.pdf
While these particular pubs don't have a location diagram for the markings, they do show what the markings are and if you can't read what the marking are on your 1/35 sheet you should be able to use the associated symbols to match them up with the ones in the pubs.
The exact locating diagrams are in different aircraft specific pubs. I've got the UH-1N manual but not on this computer.