Doubt it is an alignment problem. Tighten your tracbar at all ends, inspect all tie rod ends, front end bushings, and ball joints. 99% sure one of those components is worn and is causing your death wobble. Have you read the Death Wobble sticky on this forum yet? There is some great information there, but some of it I personaly do not agree with. Also, do not listen to anyone who tries to tell you your steering stabilizer is causing the problem. A worn out steering stabilizer will NEVER cause death wobble, and a new one will only temporarily mask the problem.