87’ 300D 603 PS pump pressure output & upgrade

[abosely]

Hopefully this is the correct forum to post this question. :-)

What is the PS output pressure on a 87’ 300D 603? I need 105bar/1500psi or higher to run the PS and hydro brakes.

I think the w124 PS pump puts out 90-95bar? If so can the pump be modified or upgraded to 115bar that later ones put out, or will I need to get a different pump?

If I need to get different pump, is there one that would be a direct bolt on to the 603? If so, what one do I need to use?

Cheers, Allen