Sounds great, hope everything goes well.

The total timing (initial plus mechanical) at 3000 rpm should be 38 degrees (or close to it).

Now with the vacuum advance hooked up, again rev it to 3000 rpm. Vacuum should be anywhere from 40 to 50 degrees.

At idle, check the timing with the advance hooked up. With your 10 degrees initial, you should pull 20-25 degrees total at idle (this is of course using full manifold vacuum, not ported).

Keep us updated!