There are several considerations: 1. is your coolant pump being used to just wash chips away outside the spindle or is this coolant thru the spindle? 2. Either way, you may have to buy a new pump and you should check your fittings as well as your coolant lines in order to determine that they can handle the raised coolant pressure. If you have coolant thru the spindle then you will have to replace the dueblin coupling at the rear of the spindle to handle the increased coolant pressure. Of course, it all depends upon how much more coolant pressure you desire.