Includes 2" spacers and heat treated studs with cad plated nuts and washers. Fits 331, 354, 392, 417 and most other aftermarket 392 type Hemi engine blocks. Uses a 1" t-nut slot and has a 6.875" adjustment slot for blower belt tensioning. The idler bracket has a mounting boss for an outboard support bracket if the racer chooses to go that route. Outboard brace is sold separate.