Yep, the whole dash has to come out, but it's not as hard as it sounds. Drop the steering column, there are bolts at the kick panels and screws along the top. You need to remove the center consol, A pillar trim, kick panels, and make sure you have all of the harnesses unplugged, have a friend help you lift the dash on out of there.
Steering stabilizers will not cure or cause death wobble, they only mask the real problem that is causing death wobble. Oil pumps do not make pressure, they create flow. Bearing clearence and restrictions make pressure. It's the crank sensor.