then you do not use a resistor box. the resistor box is for peak hold (low impeadence) type injectors, your teg injectors are saturated (higher impeadance)
edit:
unless the b18a's had peak hold injectors? i didn't think they did... if you have a mutlimeter, measure the OHMS between the 2 pins on the injectors you want to use. if they are ~3ohms, they are peak hold, if they are ~12ohms, they are saturated (and would not need resistor box).