dont buy ur switches at the shack
order carling switches gimme a call il set ya up
selenoid all depends on how many batts ur gonna run it is recomended to use 3 selenoids for 36 volts or more less problkems this way
buy regurlar ford noids from autoshit
on the switches u run one 24v power wire and jump it oiff the first switch in the setup to the rest of the switches if ur using 6 prong switches make sure u have power to both sides of the switch(middle prongs)
solder them on!!!!!!