Thanks Techman and PJL.
I will clean up the valve terminals and redo the readings.
For the capacitors- I think the can contains 1 16microF and 18microF. Are the ones I showed in post 143 suitable(2 in parallel for 16microF, and a single one for the 8)? The spec for these is here:
http://www.justradios.com/axialelectrolytics.html