I dunno, call me stupid if you want, but from what I have heard is that the stock 4V heads could flow way more air than what the engine was capable of using anyway. So unless I had the headers, exaust, intake, cam and all the other goodies to take advantage of it, heads would be the last item to look at. Not true with other lesser engines, but the cleveland 4V had pretty darn good heads straight from the factory. Now if you want to save weight, yeah a whole differant story, but shouldn't you ditch the air conditioning and heater core first?? YOu can loose more weight from that right away. And race cars don't need carpets, or full dashes or comfy seats. Anything that doesn't help it go faster should come off. What's taht?? You are not going to race it?? Then what you worried about getting max performance then?? Just drive it around. Enjoy it for what it is. Yeah you can make your Pantera a full house racer. But you can do that to about any car. A really smart guy told me on these forums once, don't try and make the car something it wasn't meant to be and you will be happy. It has changed the way I look at the car. Race car on the street can be cool, but it can also be a pain in the ass. That is why I wrote that article I did. To me, the Pantera is a very special grand touring car. It does that very well. Economical? Not so well. Ariving in style? Excellent.