If I process as B&W - what, D76 and normal stop and fix? Any idea where to look for suggested times?
HC-110 is often suggested for old film, and I've had good luck with it. If you're up for it, performing a clip test similar to what is described
here would be the best thing to do to figure out the optimum development time. Otherwise, I would recommend about 5-1/2 minutes, assuming HC-110 dilution "B" @68F/20C. That time (or actually its equivalent since I used a different dilution and temperature) worked well for the one roll of Kodacolor-X I have developed so far.
Also, be aware that the negatives may come out very dense compared to regular B&W negatives, but don't let that bother you. Assuming reasonable exposures were made in the first place, it is likely that you have usable images there.