Hydraulic through carb meaning?

My buddy's ford 460 had a couple stuck valves causing this? (His mom had it checked by a mechanic or something a while back. What does this mean? We're hoping it's not a hydro-locked engine.

HI, Mechanic quack… Stuck valves well not cause hydro-lock. Lots of water entering the carb OR a blown head gasket can cause hydro-lock. If it hydro-locked it would not turn over and it may have bent a rod (motor would need rebuilt) Pull the spark plugs out and see if you can turn the motor over. Watch for any fluid that may squairt out.

Stuck valves and Hydro-locking are two entirely different issues.

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