ENGINE STAND HEAD ASSORTED DESIGNS TO MOUNT. Condition is "Used". Mounting shaft at 2.350" diameter x 6" long with bolt hole at 3 1/4'' from the front collar. Mounting slot opening 3 1/4" x 1/2", flat base 10 1/2" long x 3" high x 1/2" thickness. Some engine mounting heads have adjustable swing arm as in the photo. Lower hole from center to center left to right is 12 1/2" . These engine mounting heads were mainly used when assembling 4-cylinder, v-6 and straight six cylinders. Some special mount can be used for the Subaru engines. These engine mounting heads have 4 holes in the shaft to position 4-cyl and straight 6-cyl at a upright, left sideways, right sideways and upside down for ease of assembling and engine. The V-6 and V-8 will have a tilt if used on those engine blocks. There are a mixtures of engine mounting heads as in the photos. Please email if you have any questions to ask.