After looking over the schematics, if it was me I’d not change any values. At this age even just a recap would likely be a potential improvement because the caps that are in there are over 30 years old. But if it was me, for signal path stuff I’d just use Nichicon KT series except for the output driver U151 coupling caps C151 (should be two of them, one for each side of the opamp…one for each channel)…that’s a nonpolar part there and I’d use Nichicon ES series there. Whether or not you can actually hear the difference just because of the bandwidth limitations of the format I don’t know. But that’s what I’d do.
