R99 & R4 - 220K, R6 & R8 - 180K
6Lo1i pinout:

Pin                  board
1                      f (filament/heater)
2                      K (cathode)
3                      G (grid)
4                      F (focus)
5                      NC (no connection)
6                      NC
7                      X2
8                      X1
9                      A (anode)
10                    Y1
11                    Y2
12                    NC
13                    NC
14                    f


Voltage measurements, using ground (0 volts) as reference (tab of 7805 regulator is good point for ground contact)

From ground to pin should be:

2 (K) = -295VDC
3 (G) = -300VDC
4 (F) = -150VDC
7 - 11 (X1, X2, A, Y1, Y2) = 150VDC to 250VDC

voltage measured across f - f should be about 4 - 6VAC

These measurements are approximate, but should be close.