Still no luck hey? Must be frustrating you more than a little by now. How about the high tension leads? Particularly from coil to distributor (Can't remember if you'd previously mentioned this or not....). however, sounds like you might have some connection problems inside the distributor itself if you're having trouble getting consistent good readings. There's not a whole lot of wiring inside the dist. though so don't worry too much. The low tension lead that enters the dist. just connects to the points in some fashion. That's it. See if you can isolate good continuity between contact face on coil side of points and small wire exiting dist. or just the coil itself. Then check earth side contact face of points and and a good earth on chassis. If they're both good I'd imagine there's no trouble in distributor.

Also, I'm not sure if you'd had the points out, but be mindful that they need to be insulated from the body of distributor. Just be sure that the small plastic insulating washers that hold points in are in the correct position and in tact. They should be right if you haven't played with the points yet though.

Keep us posted how you go,

Stu