DadS50, thanks for the excellent pics. That almost looks too simple & logical grin

I have another question regarding the dist.
I disoovered it was stuck in it's full vaccum advance position so I pulled and cleaned it up and got the vaccum advance linkage freed up. I now get maybe 1/2" - 3/4" of rotation with it bolted back in. In tests both out and in the engine it doesn't seem to return to it's non-advanced state fully when I manually turn it and release it. It appears that the return spring is integral to the vaccum advance can. Is there supposed to be an additional external return spring or is the internal spring in the vaccum can it?