So a while ago I was driving the Mustang and it started smoking bad, like really bad. It wouldn't smoke while I was on the gas, but as soon as I let off it would just billow all over. I'm assuming that it's the valve stem seals. And after doing a little research I started thinking I should upgrade the valve springs as well. The car has had some pretty bad valve float. Everywhere I look says that you need to buy new springs based on the cam you have. But the problem is that I don't have a single clue as to what cam the car has in it. :/ MY QUESTIONS #1 How do I know what springs to buy #2 Can I replace the seals/springs without removing the heads? Thanks in advance guys!