Toluene Dart - '73 swinger
Well.... Crap.
Luckily I caught it quick.. still had 60psi oil pressure too.
Found small bits of pitting from detonation on the heads and pistons too.
Got the crank fixed, nice .070 cometic head gaskets and some 1 7/8 tti headers.
All done just in time to sit at home... I guess I'll have to quarantune.. har har.