Cam belt should be changed at 60K miles intervals. If you are changing oil seals at the front of the engine, and the cam belt is even near the 60K figure since the last change, put a new belt on. It has to come off anyway for the seal replacement.
Not sure what seals gave you trouble on the day of the meet, but age would be against them anyhow on a '92 car. They perish and harden.
Interesting point I learned from Beav. If your crankcase is under higher than normal pressure, this causes seepage past the seals. There are two small inexpensive valves that control this, the PCV valve[Positive Crankcase Ventilation] and the EGR valve, for Exhaust Gas Recirculation. I have not done mine yet, and I have leaky seals. If your dipstick is popping up all the time, there is too much pressure in the crankcase.
Best of luck with it.
Do you want to buy a RHD workshop manual? They are about £90 to £100 from Australia, and could save you a lot of money.
Joe
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Black Betty [Bam a Lam!] '93 UK spec, still languishing
Betty
Jersey Girl Silver '92 UK [Channel Isles] 40K
Jersey Girl @ Mersea
Candy Purple Honda Blackbird
Plum Dangerous
White X2 RVR Mitsubishi 1800GDI.
Vantastic
40,000 miles Jersey Girl