I beg to differ the only difference is the rear main area. On a 302 pan the front bolt holes next the the timing change cover and rear bolt holes next the rear main cap are both 6 inches. On a 351W pan the front is 6 inches and the rear is 6.5 inches. The only diffenernce is the rear main is wider and taller. Every this else is the same. When you buy an oild pan gasket set they give you rears for both, the sides and fronts are the same. I have both pans in the garage right now.