How difficult is it to change thermostat for impala?

i bought a thermostat i need to know from 1-10 how hard is it to change 10 being very hard.How difficult is it to change thermostat for impala?
what year ? on the old v8 powered ones it is 2 bolts and a gasket ..takes about ten minuets...it's a 1..





i personally have had more trouble with some wiper blades i have run across..but that is just me...lolHow difficult is it to change thermostat for impala?
1 if you have a little knowledge of cars.
a bit harder than an oil change or wiper blades.. i'll rate it at a 2

bluetooth portable memory

My cat is unhealthy