All things that will help prevent understeer:
softer springs on the front / harder spring on the rear
softer shock setting on the front / harder shock setting on the rear
softer tires on the front/ harder tires on the rear
add a rear sway bar. (or put on a heavier rear sway bar)
Move weight forward in the vehicle / Less fuel in the tank = less rear weight
Add weights to the front
Add a front wing for downforce
Buy an angled front windshield (shameless plug, but it is a big wing, so it will help)
Braking or decelerating will transfer weight to the front too (my goblin will under steer when accelerating, over steer when braking)