In a 4WD try and keep the car reasonably level...our car used to madly squat and lift the front skyward. We were using stock springs and shocks with the fronts revalved 90/10 and the rears 40/60...good for a RWD car but not suited to 4WD. We put circuit HKS coilovers back in the car and set them to full soft all round with plenty of ride height and bingo! 60's went from 1.7-1.6 to 1.5-1.4...worked well. Just something to consider.