I have a 185 degree thermostat in my 93 with a full emission setup. It hovers between 175 - 185. I reach the 185 at idle in traffic, etc. On occasion when I turn the A/C on to keep it lubed, I never exceed 185 but the fans are also on.
It also holds 55 psi oil pressure in cruise and around 7-9 psi at idle.