[GB83SC]

Congrats on your first drop!
Here is a list of must do:
replace the pressure switch
replace the O-ring in the thermostat
Replace the main seal both front and back.
Replace the o-ring intermeadiate shaft.
Replace gasket oil breather hose.
Relace the 3 seals at the oil cooler.
inspect the S hose and check for condition,
Check to see if the runner hoses are puffy if they are replace them.
change your spark plugs.
adjust valves and replace gasket if you dont know the last time it has done.
I am sure I left out a few.
Good luck.