single cam ka's are very popular among the oldschool datsun guys who are building 240s'. They like them better than DOHC's because they know them better. They are good engines, but the DOHC's are technically better. Valvetrain is much more sophisticated and therefor there is more potential. But 99.9% of people modding ka's aren't serious enough to get the full potential out of a sohc, so it's fine for most.
__________________
|