MSD advance curve, how to get started?

[ogasman]

I have a MSD billet distributor, stock out of the box.  No vacuum advance.  It is in a street 482 with a tunnelwedge, 10.5 to 1 comp, solid roller cam with a stick tranny in a very light car.  I have the idle set at 1000 RPM to better oil the lifters.  Per Jay B.  I am going to put in the red bushing with the light blue and silver springs to get about 38 degree advance in at 2800 RPM. 
  Question is should I leave in the heavy springs (out of the box) and set the initial timing at 10 degrees, then switch the bushing and springs?  Or if I switch the springs and bushing, what should I set the initial at with the 1000 RPM idle?

Thanks
Paul

[blykins]

Don't be too concerned with the initial timing.  Worry about total timing.  I usually use a black bushing, with a heavy silver spring and a light silver spring or two light blue springs depending on the combo.  You didn't mention which heads you have, but most of my setups usually like 36-38 degrees total. 

[ogasman]

Hello Brent
  They are Dove heads with a custom chamber.  They look somewhat like the cleveland chambers, but more open.  I have pictures somewhere, but I have to dig them up.  They were 68 cc .

Paul