[RF7590]

Hello all,
 
  have read the phorum for quite a while but have never posted anything before.
Decided I need a little advice. I have restored and or worked on a fair amount of equipment over the years but am new to working on antique radios.

I am currently working on a 46-421. I have cleaned up the chassis, replaced all the caps and the power cord.
Now on to the resistors. I found three that are out of spec. 
A 130, 470k, and 3.3M, this is where my questions come.

These all look to be carbon comp. resistors, should I replace with carbon comp. or go with something like flame-proof modern style resistors?

If flame-proof, should I use 1/2w or go up to 1w?

Any suggestions for a good place to buy new resistors that will work good on tube radios?
I'm having a hard time finding a 3.3M resistor. I don't want to solder resistors together to get the right value.


Thanks

RF