With these old split carrier Admirals one easy way to decide is see if you can tune in a good picture and sound at the same time. By split carrier I mean that there is a separate video and audio IF right after the tuner.
Try to watch some "crisp" video scenes and listen to some good audio. If it looks and sounds good to you, then I wouldn't bother with an alignment.
If you have a test pattern generator, you can use it to estimate your video bandwidth. I think the bars on the far right in this case are 4.2 MHz. Keep in mind some sets aren't designed to have that much bandwidth.
