For Big Block Chevrolet enginesThese kits were specifically designed to provide a "plug & play" cam position signal to Holley EFI systems, although they may be used with any EFI system which can read a digital, square wave input cam signal. They are intended for use with Big Block Chevy engines with a +. 400" raised cam height and (Jesel or similar) external, dry timing belt, cam drive systems.
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