The Duraspark distributor pickup works directly with the MSD, just connect the wires like they show in the MSD instructions and go.
You can get the stock Duraspark distributor recurved by Faron, who posts a lot on this forum. Hopefully he sees this.
I'd defer to MSD on the coil. If the MSD6 instructions say you can use the Blaster SS coil, should be no problem. The instructions should be available on MSD's web site.
I like to set the ignition timing as total timing, rather than an initial value. After you have the distributor curved you will know what RPM the advance is fully in at. Disconnect the vacuum line to the distributor and rev the engine up a little past this RPM value, and then set the timing at 36 - 38 degrees for stock heads. Then let the engine idle down and see where your timing is at idle. Most of the time you'll see values in the 12-16 degree range.