Or go to the framebuilders' forum on BFs and ask there.
Frankly, after the bushfires here in 2009 and what I saw they did to metal of all sorts, I wouldn't contemplate using anything that has been actually subjected to flame. The temper in the metal disappears pretty quick smart. If the brakes and wheels are blobs, or are misshapen, there might be a clue to the heat's intensity.
But as Nigeyy says, if it's just smoke damage, it might be something to play with.