what are you trying to do?
88-91 Si, HF, LS/GS integra distributors are electrically compatible.
If you're trying to make an OBD0 LS distributor from an OBD1 LS distributor, you need to swap the 24 tooth OBD1 CKP reluctor wheel for the 16 tooth OBD1 wheel - the other sensors are compatible.