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Wall voltage should be fine. Tube heaters do increase in resistance when the
voltage goes up, so the added dissipation is less than could be deduced from
a simple calculation.
The coil tuning slug should be inside the cardboard form. Did you reuse the
original form or did you make one yourself? It may be lost due to the damage
you observed on the coil. Maybe you could find something compatible in your
junk box. You might also find a useable slug inside a discarded IF transformer.
The slugs in your IF transformers should not be disturbed.
I don't thinkg replacing good resistors is a great idea if the soldering is half-decent,
even though it may not look that good. Some of the parts in there (coil, IF
transformers, etc.) are too easy to break.
Pending the fix on the coil, you may start adjusting the oscillator trimmer capacitor
just a bit at a time, and seing how you have to readjust the tuning knob to get
back on the station. That will tell you which way to turn to move the oscillator
in the desired direction. Good luck!
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