I'm finding a lot of GMC references. Here is an ebay auction for an NOS one (ended).
http://www.ebay.co.uk/itm/56-57-58-59-GMC-6-Cylinder-Ignition-Distributor-NOS-GM-Delco-Remy-1112414-/261253833833?nma=true&si=6MAHKO1s1MdoswclsglmMCVD07M%253D&orig_cvip=true&rt=nc&_trksid=p2047675.l2557
Last edited by mphudak; 09/10/2014 12:59 AM.