Calmimi.com , smog legal header ( i think it is but never tested myself ) , exhaust and rv cam will give you a good  hp boost for the buck. The Weber will make it breath even better but you would have to put the stock carb back on every time you smog. Do you live in the city or mountains. Some Calif counties are smog test exempt after the smog cert for sale or purchase. Check with your counties DMV office. Not telling you to do anything illegal, you understand...but KN, header, bigger exhaust, downdraft Weber and you will think your Sams running on moonshine. One last thought....if your tires are over 215x15 you will notice it going uphill, with a stock 1.3
I live in the mountains east of Stockton. My email is on my profile if you need me to expound on any of the  above...Gary