tuskiso, The stamped numbers are very close to the base of the distributor. I put a arrow on your pic.
You did find the casting number 3921968 which is for 1967 to 1979 250cid, or 67-70 230cid
Con 2 is conveyor 2 and GM 65 is general motors mold number 65. (Nothing useful their.)
Sorry to send you back again, but you'll get it this time. No problem. Just stay close to the base of the distributor. You should see the pad. It shows in the pic. Right where the arrow tip/point is.
