I had a cam gear failure on my Ford Racing crate motor. I guess I'm fortunate that they took care of it completely. (Well, other than having to remove it, crate it up and reinstall it when the repairs were done.)
I'm no expert on
oil, but it's my understanding that the viscosity of a 20/50 weight
oil is really high at startup temperatures. Don't know if that contributed in any way, but you may want to consult with Brent about which
oil he recommends when you get it all back together.