302 heads-Is it worth putting them on a stock 318

I wouldn't bother with 302's. Many years ago my Barracuda ran a 318 with some J heads that I had ported. One weekend I swapped out my J heads for a set of 302's that I also ported....the results were the car ran half a second slower at the drag strip with the 302's....needles to say, those 302 heads came off the car and were sold.