My daily drive Mark VIII is getting mighty tired...it just turned 198,000 miles and I've never been real easy on it, so its about time to either rebuild it or replace it. Kind of hoping it will make it through the winter as is, but today gave me reason to doubt that. The body still looks like new, and I am replacing the seats and carpet, so the interior will be mighty nice as well, so its worth it to bring her back to new. Anyway, as long as I have to go through the engine, I am wondering what the best bang for your buck performance upgrades are. I don't mean supercharging or nitrous here...I want to stay naturally aspirated. I am pretty sure I'll get ceramic headers and lower restriction exhaust, but where else would be a good place to put a few extra bucks?