Can anyone tell me if this is original?

[100%Chevy]

I think GM started using the mounts in 1965.My 65 Impala has the stop lifts on both sides.
The one on the drivers side stops the engine from rising and the one on the passenger side stops the engine from moving downwards!
There are a lot of variations on these stop lifts.They made them for small blocks and big blocks,for engines with a/c and without a/c.For our trucks as well as for cars.
The new interlocking mounts work but don't allow for the power steering rear bracket on a lot of models( my Impala is one!).So,it's not a cure all.
I think GM used the stop lifts as a cheap(labor wise) alternative to the cost of replacing the engine mounts entirely.
Mike.