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[Electronic M]

Resistors of sufficient wattage are good.

Capacitance isn't hard. If you know the ballast resistance just Google search capacitance impedance calculator and look for one that lets you plug in the impedance and frequency and get the capacitance...Or plug in the frequency and guess and check the capacitance a few times (8.2uF is a good starting point).
IIRC the heater portion of both Motorola ballasts used in that chassis family is the same so that math shouldn't need to be redone...The non-heater resistors need to be resistors anyway so there isn't much to dealing with them.

If you're concerned about messing it up start it on a variac and measure heater voltage as you crqnk up the line voltage.