By the way i am personally having starlet kp60 .... The best way to do it to swap toyota 4a-ge 16v with lsd gear and diff ( setup is available in khi for sale ) along with installation. This setup will keep the weight and power ratio balanced of starlet and will be resulting as daily driven drift car, the best thing about it it 4age will fit perfectly bolt on on starlet engine mounts.So i would prefer this if 4a is not available at your place then go for 3s 2000cc it also results in good spin .