The car is my 1968 white charger 383. It has the original 727 in it with a 3300 stall. We put it in probably 15 years ago. I don't drive the car that often. lately when I start the car it warms up and then every time you step on the gas the car starts to lunge forward while it's in park. It almost seems like the transmission is engaging while it sits in park.. It's just not running right. Possible stall converter problem? Or do I have tranny trouble?. Doc