I believe that the 3.5 liter pumps were set with a 4600 RPM maximum speed, while the 3.0 pumps were set to 5150. I'd recommend 1.75 turns CW to start if you want to be conservative, maybe go 2.0 turns if you want to see if you can get there all at once.

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Respectfully,
/s/
M. Dillon
'87 124.193 (300TD) "White Whale", ~392k miles, 3.5l IP fitted
'95 124.131 (E300) "Sapphire", 380k miles
'73 Balboa 20 "Sanctification"
Charleston SC