We put an Engle Hydraulic Roller Cam in my 418 stroker and ordered the hardened steel gear with the MSD Distributor.
Summit sent one with the cast iron gear and unfortunately, we assumed that Summit had sent the correct unit.
The Dist. gear lasted about 125 miles and just disintegrated.
Luckily, the engine stopped immediately and after a short tow, I was able to drain the
oil (lots of chunks present), pull the
oil pan, clean it thoroughly and check the
oil pickup to see if anything had passed.
After an all clear for the oil pump pickup, and a new hardened steel gear installation, it has been fine for the last 2600 miles.
No issues with the cam.
Jim