out of all the types of spring i have ever come across only one type (tangential) is cuttable in any form and doing so increases the spring rate anyway so needs some serious maths/measurements and understanding first
the top of
ibiza springs are pigtailed but if i remember the bottom is tangential so theoretically it is possible but and i MEAN BUT considering the time/effort/calculations and lack of multiple pieces and test equipment to verify results you may as well buy some
lowering springs
be a lot safer and simpler
the calculation is (11,250,000 times the wire diameter to the 4th power) divided by (8 times the active number of turns times the mean diameter cubed)
then on top you will need some shockers that operate correctly to match the new spring rate/length as your standard ones will just bottom out on the first corner pothole and put you in the wall