I'd agree with Bill that 60psi should be more than adequate.
If your engine is fairly stock, with 'normal' bearing clearances, 60PSI is plenty.
But you don't need to purchase a different pump to get to 60psi. Just change out the relief spring assembly to a 60psi setup.
And, YES, get the hardened driveshaft. One less thing to have an issue with.
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