I think I'm done with this set! Q703 shorted again, causing the video to cut out like it did. I don't know why it happened, but rather than install the other used one that I harvested from the junk chassis, I checked with the electronic supply store in my city & they had the NTE159. They also had a 33mfd @ 250v so I grabbed that to replace the 30mfd@ 250v. They even had the SAMS for this set for $10 so I got that as well.
Video problem is fixed, bars in the picture are still there so that cap wasn't it, but they're really not noticeable enough to pursue it further IMO. It was cool finding this set and interesting working on it, and I hope it keeps working like it does.
For anyone interested, Chester Electronics is in Kenosha, WI. Someone did a Youtube video recently in the store, if you want to check this place out, it's amazing. They even carry vacuum tubes and have a tube tester.
https://www.youtube.com/watch?v=VAs7adDdcaQ
Thanks to everyone who chimed in here.