Rocker Arm - 1.650 Long On-Center Short Tail

The Rocker Arm - 1.650 Long On-Center Short Tail from T AND D MACHINE is a precision shaft-mounted component engineered for Big Block Chevy engine builds. This aluminum rocker arm serves as a critical valve actuation component, translating camshaft motion into precise valve lift and timing. Whether you're rebuilding a classic muscle car, upgrading a street engine, or assembling a performance platform, this short-tail design offers compact geometry ideal for tight engine bay configurations while maintaining full mechanical advantage.

Manufactured from aluminum in a natural finish, this rocker arm features a 1.75 leverage ratio with full roller contact for reduced friction and extended component life. The on-shaft mounting system provides direct, rigid attachment to the rocker arm shaft, eliminating deflection under valve spring loads. At 1.650 inches long on-center with a short tail configuration, the design minimizes overall height while preserving adequate clearance for valve covers and intake manifolds in space-constrained applications. The roller fulcrum reduces parasitic drag compared to flat-pad designs, improving power transfer efficiency and reducing wear on both the rocker and pushrod.

This rocker arm is ideal for Big Block Chevy engine builders, vintage drag racing platforms, and restomod projects where compact packaging and reliable valve control are essential. The short-tail geometry makes it particularly suited to applications with limited valve cover clearance or non-standard manifold configurations. Installation requires proper shaft alignment and torque specifications per engine manufacturer guidelines; ensure compatibility with your existing pushrod length, stud height, and intake geometry before assembly. Weighing just 0.33 lbs, this component integrates seamlessly into complete rocker arm assemblies for street, strip, or show-quality builds.