Cool project bud, vintage audio gear for the win! I'm not a big fan of led lighting myself, old gear needs the warm yellow glow! Anyway calibrating the amplifier section is easy. Measure the DC offset and ensure it is within specs, on some amps this can be adjusted while on others you need to replace some transistors to correct if it's too high. Then check and adjust the bias. Tuner alignment is a completely different kettle of fish. That requires specialised equipment and needs to be done professionally (although if the tuner is stable and sounds decent I'd not bother).