It mounts off the water pump holes and is meant to be used for competition use. Fits 396, 402, 427, 454 and most other aftermarket BBC engine blocks.
Uses industry standard .750" T-nut slot and has a four and half inch adjustment slot for blower belt tensioning.
Note: This is a used item. This item might have been taken in on a trade. RBS may have inspected this item and deemed re-usable. There is no warranty expressed or implied with this item.