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4 After lubricating the cam journals and bearings (preinstalled during the machine-shop work), John carefully installs our Comp Cams stick into the 289. The rear core plug has not yet been installed because the engine stand was in the way, so John has to be careful the cam doesnt slide back too far. The 284HR grind specs out at .533 lift and 224 at .050 duration on a 110-degree centerline. It may sound stout by flat-tappet specs, but these numbers are quite streetable when they are coming from a roller grind.