71 Dart 410 stroker ..

Looking at the other 7 pistons ...none show any sign of eyebrows from either the intake or exhaust valve....these exhaust valves are the original stainless steel valves that came with the eddy heads. We are running PAC 1903 springs...about 145 lbs on the seat ...and 370ish over the nose....Brian set them up last year went I changed from 2.02 to 2.08.......

As far as what broke first I have no clue....my best guess the valve broke and cause the rest of the damage...the cylinder wall is cracked in 3 different places....one piece of exhaust valve ended up in NO. 2 cylinder ...putting a small dent in the piston....going to replace that one also...but no damage to the head....

so moving a head....engine is completly torn apart....all scat rods and K1 crank are good...