Dumb things that you did.......because you didn't know any better.

On my stock '71 340 re-fresh back in 1983, was running a .484/284 hyd., changed to a DC..590" sft cam and had the piston reliefs cut .100" for ptv in my ignorance. Motor ran ok NA but reliefs were now very thin at the sides, when I put a Big Shot N20 kit on it it took 1 piston out at the side. Live and learn eh.
Having learnt a lesson, I left things as is on my 440-6pk bottom end and put a [email protected]/.650" sft cam in there which had plenty of ptv which surprised me as the 4 notches on those weren't very deep, pushed that motor to 7300rpm....once!!