Did you try & inject a signal at 1Khz into the top of the volume control?
If you get signs of life from the audio stages then backtrack with a 465Khz signal along the IF strip. The IFT's may be far out of tune, such was the case with the working example of the S66E on my bedroom shelf.
You did bridge
all of the test points with solder?
I made that mistake with the S66E as well.
They must be buying up QC reject components for these kits. Make a tuned circuit with them & it's never going to work. But total silence is mystifying when you used so many of your own parts.