70246130 New Muffler Fits Allis Chalmers D19 Gas Engine Tractor 616

70246130, 79015993, 246130. D19 (w/ Gas Engine, 1961-1963). Fits Tractor model Lawn & Garden. Replaces Part Number(s) Dim F (6) F: 27" Overall Length. Dim C (3) C: 16 1/2" Shell Length. How do I know my order was placed successfully?.