Well, it turned out to be simpler than I thought, one of the trimmer screws in the 1st IF stage seized up. It turned, however, it wouldn't turn all of the way to the end. It was just enough that it wouldn't pass a tuned signal. Fixed it and realigned it. Really a great performing set, I've been running it for the past few hours on my workbench while I work.
Not too bad looking of a set
Silvertone 1771.jpg
Interesting note, almost every resistor was +30% out of tolerance, weird to have so many like that. Almost thought it was my meter at first.