What is the condition of the rest of the engine? What are the
compressions? (Consider giving it an automotive style compression test
also, those sometimes reveal things a static one won't). End play on
the crank? Oil usage? Oil seepage out the ends of the engine? Does the
cockpit smell oily when the heater is on? Scope the cylinders. Valve
wear?

No one really KNOWS what the future of your engine may be. It is a pity
the previous rebuild did this. Perhaps they did not replace the cam?
What else didn't they replace? (the bearings?). If all they did was
top it, you did ok. But if all they did was top it, perhaps you should
go for a full rebuild now. The bottom line is: HOW MUCH MONEY DO YOU
HAVE? Do the best you can afford.