My understanding is that Technicolor prints require a bright-ass bulb to prevent them from looking really murky, and this is part of why they've been historically more difficult to scan than other prints. Blown out whites and murky blacks are likely just part of their distinctive look. They don't look like other film prints, they don't look like the prints the DP's look at to approve the timing, heck, they don't even necessarily look like other Technicolor prints--their primary value is that, over time, their color doesn't hardly fade at all, compared to the other crap filmstock used in the seventies and early eighties, so in many cases, they're the best we've got.