tryin to break in new engine, ruff idle

Thanks aarcuda, I agree !
If I remember right, the reason I changed the position of the dist. slot was, because when I went to time it, I found that I was limited to how far I could turn the dist. , because my vacuum advance would hit my sending unit, and I needed more.
Sorry about that. This was a while back.

that is usually the only problem with where the slot is lined up with...the vacum cannister hits something ..

have you checked your plugs....make sure they are gapped correctly...

it is going to take a processes of elmination to figure it..