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We exchanged the stock springs that came on the Dart Iron Eagle heads (right) with larger 1.437-inch-diameter Comp Cams springs (120 pounds on the seat and 290 pounds at 0.550-inch lift) to handle the larger 284 Xtreme Energy cam.
Chevy Small-Block Power

 We exchanged the stock springs that came on the Dart Iron Eagle heads (right) with larger 1.437-inch-diameter Comp Cams springs (120 pounds on the seat and 290 pounds at 0.550-inch lift) to handle the larger 284 Xtreme Energy cam.  View Related Article

 

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