pokertramp

I was looking into all of this but I have maby one question. When it comes to timing and the adjuster to adv or retard, do I leave my distributor at TDC and adjust it by the MSD module? It is basicly for a 66 inline 6 mustang 200ci. I plan on going with the HEI from classic inlines and all MSD also for a turbo/blow thru carb set up. Anything anyone could recommend for my ignition set up?