Are new boxes Jord to come by or is it a case of getting it reconditioned?I'd say gearbox and clutches are the only thing that causes some problems but only in heavily modified or abused cars. I've had one gearbox failure in 3 pulsars and that was covered by the abused comment. I was young and drove it with no mechanical sympathy what's so ever.
Generally these cars are very tough and reliable if maintained correctly. Start cutting corners or modifying badly and look out.