Ever get near Mason City?
Here's what I found so far:
I'm pretty sure the round piece is the backing plate for a sanden compressor so it will fit a Rabbit.
I'm pretty sure the long bar is an adjuster bar for a Rabbit with AC.
I checked all the bracket holes and they have threads where they are supposed to.
I might have an alternator too.
Haven't had a Rabbit with AC for awhile so you might need to check against picture you can find
or maybe some rabbit AC expert will post up.
I have several of the MK2 front compressor brackets,
with the pully.
I'm not sure it will work on a Rabbit without the pully.
I do know the rabbit doesn't use the pully so it's not needed.