I'll try to remember to get you a better photo, but the number I quoted above tracks to what I'd said, unless someone can get me better info. All this mismatch is why I'm asking for more info. Here is best photo I have of distributor right now. Notice the octane selector and grease cup of old school, also lack of vacuum advance, I expect due to being on a big bolt. From your download JoeH, I guess the head is from a 66 or 76, 250 CID, made June 1.
