Attach you old stock one and look------
Is there room to raise it higher or will you have to lower the boom or have the sail cut?
Check the out haul.
Will you have to lengthen the boom and maybe run into the back stay or have the sail cut?
Undo the tack and see how much you can raise the sail.
Lower you sail and add the new measurment of the used sail and see if it will fit.