not a high probability, so soak 100 seeds or all of them.. 12-24 hours then sow. pray one pops.
ph adjust the water is fine, but the seed doesn't require anything initially, if it does germinate. could try scoring a few shells, if you think it might be the hardness of the shell holding them back.. .but 30-40 years? i wouldn't expect a high rate of poorly stored seed.