Setting up MSD distributor

Seem to be some members here who have good handle on setting up ignition timing.
Where should I start with setting up this msd I have what springs etc should I use as initial setup?

360 is approx 12.5 to 1 mild ported J heads cam is sig erson 3h 477 lift 240/240 @50
Victor 340 with 750DP annular discharge

Fuel will be premium unleaded with water/meth injection

3500 stall and 3.91 gears in my 67 Barracuda.

Any advice appreciated