Solid lifter / Hydrualic Cam

Yes, this is what I read.
“In many cases, it’s acceptable to use mechanical lifters on a hydraulic camshaft if relatively tight valve lash figures are used,” adds Knight. “Without clearance ramps on the hydraulic lobes, lash settings of .005-inch are usually appropriate. However, we do not advise hydraulic lifters to be used on mechanical camshafts. The lifters will react to the clearance ramps as they would to lobes with excessive base circle runout, resulting to premature lifter pump-up, valves being held open, a loss of power and an excess of pressure in the lifter that can break it. One possible exception might be a dedicated racing style lifter that’s produced for hydraulic lifter rule restrictions. This would have an extremely short plunger travel (.010- to .020-inch) and a quick leak-down rate, essentially acting as a mechanical lifter when in operation.”