I just replaced mine with the KYB 341012 listed here, no probs:
https://forums.nicoclub.com/280zx-rear- ... 58757.html
FRONT STRUT:
1984-1989 NISSAN 300ZX
MONROE Part # 73229 OESpectrum - OEM replacement
KYB Part # 365056 GR-2 / Excel-G - OEM replacement
Gabriel Ultra/Shock/Strut - Part # G44968 Alternate Part # G46818
Tokico HZ3100 HP Series
Tokico BZ4005 Illumina shock (incl. adj. susp. turbo) five-position adjustment
Koni 8641 1060 Sport
Bilstein B6 Part # 34-002643 Old Part # F4-P30-0264-H0 Old Part # F4-P30-0264-H1
REAR STRUT:
1981 Nissan 280ZX or 1984 Nissan Maxima
MONROE Part # 71209 OESpectrum - OEM replacement
KYB Part # 341012 GR-2 / Excel-G - OEM replacement
KYB Part # KG9101 Gas-A-Just - Performance replacement
Gabriel Ultra/Shock/Strut - Part # G51229 Alternate Part # G51020
Tokico HU2286 HP Series