My points burned badly right near the end of  the Stowe Vt car show Parade which unfortunately lasted 2 hrs at idle. I managed to make it back to my motel & decided I would change them this morn as I had a few spares in the trunk.  Well lo & behold they were completely different. My engine is supposed to be a 272 Engine.

The mounting holes on the base are appx across from one another. My spares were not , The arms on them have an offset on them, so they would not work. So assuming got me in trouble again! I really did feel like those first 3 letters.  I did find a used set that I cleaned up enough to get me home.  Has anyone come across this & let me know what I have got, as I would like to go to an electronic change-over and I would want to make sure I had the right mount??  I also had a spare distributer in the trunk & that also had the offset points in it.      Please help as I don't want to get in this situation again!!!   What is the differences or changes, yrs, are of the Distributers?    Thanks, Mike