Brake pedal sits too low

So I'm currently working on getting my '68 Barracuda on the road, and have run into a but if an issue with my brakes. The pedal sits a little to low for my liking, which is fine, except for the fact that the pedal lever does not make any contact with the brake light switch (so my brake lights are always on). Is there a way to adjust the master cylinder pushrod to correct this issue?

Also, how is the pushrod supposed to sit on the master cylinder? There is a conical-ish rubber boot on the pushrod, and I don't know where it's supposed to sit.