if you have roll bars heres what you can try.
stiffen the front, and soften the rear bars.. if you dont have any optional bars, then use roll bars at the front and remove the rear ones.
if the spining is still happening, then i might try to reduce the front droop and see how it goes.. droop does big changes to your car's handling and the above metioned stuff are what i will try out first.
check your car for chassis tweak as well.