Now timing can be adjusted with greater accuracy than ever before using the Lunati 3 or 9 keyway roller timing set. The 3 keyway timing sets can be adjusted 4 degrees advanced or 4 degrees retarded. The 9 keyway set has a unique crankshaft gear, forged from chromoly steel, has 9 slots machined into the center hole, allowing advance or retard of 2, 4, 6, or 8 degrees. The 9th slot allows timing to be set straight-up. The timing chain is highly accurate full roller.Full roller timing set for Ford 429-460 applications

* Keyway(s): Nine (+-8, +-6, +-4, +-2, 0)
* Roller Diameter: 0.250 in.