727 on a 360

All you need is a converter that has balance weight welded on it. It's for balancing the 360. The 318 or 340 were internally balanced so they didn't need the weight. The weight is welded on the front face of the converter about half way between 2 of the mounting bolts where the flexplate bolts to it. It's about 1 inch by 1/2 inch if I remember correctly.