It was written as a full conversion hack. I wanted to run some 1920s occult horror, so I sort of overhauled the whole ruleset.
With some adjustment, you can port any parts you like back to standard Mork Borg, but it isn't plug-and-play. There's a new attribute (Stability) which in turn affects magic, social standing, and a number of other small things.
Equipment and vehicles are probably the easiest things to convert, but they come with a new mechanic (bleed) and are more lethal than normal Mork Borg gear.
If you're looking for regular Mork Borg expansions, I do have a few of those (Bork Borg, Fisk Borg, Perfidious Protoplasma) and there's mountains of cool stuff by other creators on itch.
If you're specifically looking for 1920s occult horror items/vehicles/spells for regular Mork Borg, I can write a Mork Borg expansion for that, but it'll take a couple weeks to spin up.