i have similar problem
when my car was painted all the writting come off except the engine and chassis number cause its engraved.

as for the other plate withh all the numbers
early 70s did not come out with them on the other side

so now i have the orig plate with no writing such as
DATSUN MOTOR CO.
engine
make..
model..
etc

so what would i do?????????/
and can some 1 post pic of early 70s compliance plate????????????
so i can make some stickers or texter the blanks in
feel free to blur your engine and body number

i cant think of anything else