Running hot or not

Ok bit of back ground, i have an 1989 90 with a 19jtd engine on picking it up i had a 90 mile journey home, i noticed if i keep to 50 mph the temp stayed around 90c if i pushed to 55 or 60 it headed to 116c. After checking various things i found the rad was clogged up with mud, blasted it through with a jet washer and now at around 50 mph it runs at slightly over 82c, if i push it along at 60 the temp rises to around 100c question is is this temp ok long term or should i be looking further, by the way it has an after market temp gauge fitted thats what the readings were taken from.