Roots MFI BBC set up on about 1800 hp. Right side head is annhiated. Every quench pad is caved in as if hit with a sledgehammer and 3 of the 4 quench pads have nickel sized holes opposite the spark plug. I’ve run this basic tuneup for years, have made a few passes that were way more aggressive (10-15 numbers leaner on the main for the same air occasionally with 1 more degree of timing). Worst I’ve ever seen is a little bearing squish. One time I took about .030 material off a couple straps on a 1/4 mile pass. This was an 1/8 pass. Set to shift at 8200. It’s been about 8400 before without issue. Shook in low gear which knocked the wires off the shifter. I realized it wasn’t shifting but it nosed over while I was reaching for the handle. Hit the handle thinking it would start pulling again but it didn’t so finally lifted about 550’. According to the grid it nosed at 8300 so it was already hurting itself at this point. Only 2 things I can think of are: it shook the shutoff closed despite the over center spring, or the grid somehow jacked a bunch of timing in. Does the chambers being beat in point to a timing problem?