I finally checked all the resistors. I will probably replace just five, maybe 7 total. For the most part the resistors seem to be carbon film type. The only carbon composition resistors are the 12 ohms 1 watt in both channels. The bootstrap resistors (1.5 K and 2.7K) are carbon film type and are gold banded tolerance, actual values from DMM are 1.527K, 1.524K, 2.723K, and 2.661K. They will be left alone (except for the one that is a different type as opposed to carbon film).The ones I am replacing are 27K (2), 10K (2) and 2.2k (1). There are two resistors on the A channel that I may replace as they are different types of resistors (having 5 bands and different color indicating a type different from carbon film). They are 100 and 2.7k valuewise.
With respect to the 0.2 ohms, 5 watts resistors, in the aggregate the minimum values are at least 0.2 ohms with the maximums anywhere from 0.3 to 0.5 ohms. My personal opinion is that at an output of 50 watts RMS per channel, the variations are insignificant although out of tolerance. Please comment if you disagree.
With respect to the service bulletin, the diodes (currently glass bodies) on the A channel will go back to original gray bodied diodes.
Last step will be to unsolder the TO-66 sized transistors from the PCB and test with PEAK Atlas DC Pro.
Then the actual repair will start (once all the parts are available)!
There are two questions about the schematic, i.e for the main circuitry (both A and B channels) the electrolytic capacitor marked as 250 mF (typo???) on the schematic but is a 220 mF mounted on the PCB and the other is a 0.47mF capacitor wired in parallel with the Bridge DC outputs as designated on the schematic but not wired at all on the present amp.