These engines have a 3/4" x 2-1/4" shaft. The shortblock replacement for the HSK60-76008 is part number SB756289. The newer style engines have a thicker mounting base. If you have studs for mounting, you may have to knock them out and use longer bolts to mount the engine. The newer overhead valve engines are about 2" wider torward the right side as you are looking at the shaft side of the engine. You will have to make sure your control chute rod will have clearance due to the engine physical size difference.
