These complete Harland Sharp assemblies represent the ultimate in valve train components for high performance use in your big block FE Ford. CNC machined aluminum rockers with precision roller tips, oilite bronze bushings, and heavy duty adjusters compliment the billet steel rocker stands and spacers on this super duty assembly. For engines with spring pressures exceeding 350 lbs open, this kit has end supports which provide extra stability with a cradle design that surrounds the end rocker reducing shaft flex at the tip. Available for 390-428 and 427 Medium Riser engines. All components available separately.