Speaking as a lay person, I'd say use the numbers loosely as a rough guide, if at all, and just make events as dramatic as you can. Throw in the sentient, growing void at whatever point it seems like it'll have the biggest impact.
When I played through that module a few years back, I don't remember what clues we had as to the nature of the 'mass', and when we discovered it in the cave I jumped into it, under the impression that was an energy field that held some malevolent force inside.
Turns out there was nothing in there.
Gnome Boy (a.k.a. "Jon") • DCC play-tester @ DDC 35, Feb 2011. • Beta DL 2111, 7:00 AM PT, 8 June 11.Playing RPGs since 1977
• Quasi-occasional member of the Legion of 8th-Level Fighters - Holds the power to play gnomes at will!Here Be DCC Monsters...General Yoros, Warrior, Str 13, Agl 8 (10), Stm 17, Per 13, Int 11, Lck 8; Law, HP 39, AC 17, R+2, F+4, W+2, band/shld, warhammer, longsword, longbow, pitchfork
Han Dee, (Weaver) Neutral Thief, Str 10, Agi 13, Stm 11, Per 11, Int 15, Lck 14, AC 13 (Leather), HP 25, Luck Die d6, Backstab 3, Sneak Silently 10, Hide In Shadows 9, Pick Pocket 10, Climb Sheer 10, Pick Lock 9, Find Trap 9, Disable Trap 9, Forge Doc 10, Disguise 3, Read Lang 5, Handle Poison 3, Cast Scroll d14+2, birth augur (Born under the loom) +1 to all skill checks (including thief skills), Banepicks (auto pick lock/disable trap, but lose 1d3 random ability loss, if a 3 then 1 pt is perm)