MSD to 340

One of the new guys making his way around the web site,been very helpful so far but have now run into my own wall. Putting new MSD distributor, 6AL box and coil in my 340, ballast resistor,do i still need or use it? Also,looking for engine wiring help in general..... :banghead: would be most grateful to anyone who could help!!!!!!!!! Jim
1970 dart swinger