How many young is average for these guys and is the incubation time the average 60 days?
False water cobras can produce fairly large clutches of reportedly up to 36 eggs. However, a clutch of that size is certainly not the norm and should be regarded as the upper limit. Furthermore, the claim that Hydrodynastes gigas lays between 30-42 is obviously plain false information. I would place the average clutch size at between 9-18 eggs.
Incubation period varies, depending on the incubation temperature.