Early Model Small and Big Block Fords

Part #: 556-123

Brand: Holley EFI


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Specifically designed for use in unlimited racing applications equipped with an external, dry timing-belt, cam drive system, where the bracket must be remote mounted to a front motor plate or some mounting surface other than a designated cam cover mounting flange. (i.e.: Early model Small & Big Block Fords, etc.)

Universal Cam Sync Systems

Part #: 556-123
  • Length: 6"
  • Width: 3.25"
  • Height: 3.25"
  • Emissions Code: 4
  • Prop 65: No
Installation Notes:

Installation of this kit should not be attempted until the instructions have been completely read and understood.


  • Includes 3 wire hall-effect sensor
  • all billet constructed
  • anodized
  • aluminum bracket & stainless T-Nut
  • better than grade 8 mounting hardware
  • mating connector
  • and SS ¼”-20 “flying magnet” screw w/ high-temp
  • rare-earth magnet
  • Unique t-nut and bracket design allows for complete sensor adjustment from the outside of the bracket with a single jam nut
  • Designed to provide a plug-&-play cam position signal to Holley EFI systems yet compatible with any EFI system which can read a digital
  • square-wave cam input signal
  • Bracket assembly can be mounted at any angle about the perimeter of the cam pulley to clear various front accessory drive arrangements