I've had this happen when my grandfather sold the old farm. He bought
out the local Western Union store automotive section. Best place I
found answers was on the internet. Just type in the information you
know. And see if anyone has ever written about it. Amazing how much
info is out there! Also some of the parts that don't look real old you
can ask your local NAPA store about the cross reference. If they are
having a slow day. (In our area that happened right after Car Quest,
AutoZone, & Advance put stores within 1000 feet of the ol Napa store!)
They are more than glad to help out! Be kind though and buy something
more than a $0.99 air freshner before you leave!