Jenkins

I currently own a '79 280zx that's in pretty good condition w/ no mods as of yet. Right now I have it parked because I am doing some minor work on it, since I don't drive it in the winter. I was wondering if anybody has some advice or tips on getting more power out the stock engine. Success stories perhaps? I was originally considering doing an engine swap, but after doing some research on it I feel that it would be too much work and time consuming. I would appreciate any feedback.