I agree with this. I have thousands of dollars in my 400. You have to replace the sprag and drum on a stock 400 to handle any power plus a stock sprag will grenade when you come out of the water box. Powerglides are relatively inexpensive to build. Basically all you need is a soft parts kit and an input shaft (to make it a turbo spline). As light as your car is the glide in my opinion is the way to go. Plus, the consistency of a two speed is deadly.