Hey Disco78:
The item is a carburetor air cleaner vacuum control valve. Depending on
your engine set up (and since you have a 2.3L) the part is either a
D5AZ9A995 (most likely) or a D7FZ9A995A. Green Sales has one D5AZ9A995.
If you give them a call at 1-800-543-4959 and ask for "Doc" he can help you
with locating the item since he has a Pinto and knows a lot about them. Also,
if you need a diagram showing the vacuum line locations let me know and I
can post that for you.
Thanks,
77pintocw