Yes and No, they were contract cams. The numbers you see are manufacturer contract numbers (IIRC) that didn't jive with any MP part number. Whom ever came in with lowest bid made the run they needed. Usually you can ID them with the lift alone. hydro cams have no lash ramp, they just pop the valve open because they run with no lash. Solids need some ramp to close their lash so youll see a slower ramp up. you can see this when you turn the cam under a dial indicator. Hydros will pop right up with little ramp, solids will gradually sneak up a longer ramp and then pop the lifter up.
