What is the normal water temperature range for a stock 283 small block Chevy motor?

The normal water temperature range for a healthy engine, Chevy small block or otherwise is pretty much totally dependant on the thermostat fitted on the top of the engine. This assumes the cooling system is clean, unblocked and of course filled with water (or coolant). Thermostats come in 88C, 90C or 92C - possibly other temperatures as well. It is possible to run engines with water temperatures slightly above 100C, noting cooling systems are pressurised. This is not ideal, as any leak or depressurisation will cause the whole cooling system to boil in an instant - eliminating any cooling effect instantly.

Most 283's came with a 180 thermostat. A 195 would work fine if the radiator and hoses are in good condition.