New torque converter?? (and cam question)

I'm a little chicken when it comes to stock mopar valvetrain. I installed a .474 lift Mopar cam and took out a .425 lift cam in a 273. The adjustable valve train had been ditched at some point. I was going down the highway and lost a cylinder.... turns out the push rod came through the stock stamped steel rockers. There was more than one on different cylinders but they didn't come through yet. I couldn't tell if I did anything wrong because it ran good, timing was correct, cam installed correctly, etc... I replaced the destroyed rockers and drove the car for awhile before I took it out for the 360. I guess I should have at least bought new stock stamped steel rockers for it but I would have never thought of doing that since they looked fine when installed.