Edelbrock oil leak. Finally figured out why!

I was told 400 degrees before any softening begins. My friend Bob Snyder @ Snyder Race Engines says he's used it for years in his race engines for bonding lifter valley screens to the block and has never had any issues with it coming loose or melting so I guess that convinced me to give it a try. But he also said that there are two different types of JB Weld. He said not to use the quik set 5 minute stuff as it isn't as good. Get the type that takes 24 hours to fully cure.