The twincam KA is way way stronger than 10more hp.

My stripped 89 coupe has one of the only sohcs that hasnt blown up yet.. Its prob the fastest sohc around for having a stock exhaust wtih a fart pipe (compliments of bill). I can run 15.9. But against my PIG heavy not reliable HICAS the hicas pulled it on the highway.

Twincam > singlecam by WAY more than 10HP