Basically villain should call here with any spade regardless of what level zook is on imo.

If zook is on a low level then its super hard for him to have a big spade and he never valuebets a small one. If he's one a decent level he may valuebet some small spades, but i still think its far fetched that any spade wouldn't beat zook's range.

I'm pretty sure the best play on zook's part would be to bet an unbalanced range of only value here, i.e. 10s+, without some really sick history.