Check this link;
It's a prep manual for the FWD F10 Datsun Cherry so ignore the non engine stuff but it gives all the info you need to prep an A series engine regardless of whether you are building a race motor or just rebuilding a stock motor.
I'm not 100% on CA smog rules if your car is smog exempt; go with moderate cam something around 270 advertised duration and .400-420 lift, a weber DGEV, header 2" exhaust and clean up the ports on the head. You can use SI valves, they are standard size but have a narrowed stem for increased flow. Use a .8 thick GX head gasket. All that should net another 20-25hp give or take. The car will,feel,like a rocket..........till you race a Camry up an on-ramp.
If you do have to smog it; then clean up the head, add the aforementioned valves, use GX spec cam, 2 inch exhaust and a .6 head gasket. I'd expect around 10-12hp increase. While that sounds a bit pathetic it's likely to decrease the 0-60 time by a full second and increase the top speed 5mph.