One of the most common mistakes when building a Chevy engine is neglecting to check the rocker arm geometry. This is usually due to the name of the procedure being misleading and implying the ...

A:The Pontiac 151-inch (2.5L) L4 Iron Duke rocker arm fulcrum-to-tip distance is greater than a Chevy small-block, plus the Chevy small-block rocker has a 1.51:1 ratio, while the Pontiac uses a 1.71:1 ...