I've got a list of what Mods fit into which of the 31 QUEST pages (the maximum quest pages), and have an upper limit for number of quests for each page designated. With what we have right now, it leaves about 32 quests per remaining page, with 75 quests to spare for more contracts or to increase the quests on another page.
Botania is 42 quests large, with a LOT of condensing. Extra Utilities is 30. MFR and Progressive Automation split 41 quests between the two. There are currently 35 Production Contracts, and I'm expecting this will double before I'm done. Doing a new count, there are actually 440 quests, but roughly 40 of them are invisible 'trigger' quests, or placeholders that will become actual quests later.