If you lifted the front end to put the 35's on, then alignment of the caster, camber and toe is necessary. If you just directly replaced the tires, then nothing is required. If, however, you did replace the tires with wheels that now locate the centerline of the tire was outside than original tires, then the camber and toe must be adjusted.
With the design configuration of the a-arm (coming off the side of the frame), the centerline of the tire was designed to be at a distance for a given frame height. If that distance is altered too much, then re-alignment is necessary.
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