Take a rubber mallet and give a good whack to each valve on the cylinder to see if they are free. That head is probably going to have to come off. Hopefully the piston and cylinder wall isn't damaged.
'64 Sport Fury, 528 Hemi, FiTech EFI, 4-speed, 4.10 Dana 60 '57 Belvedere 2dr sedan, current project in process '19 Cherokee Trail Hawk Elite '03 Ram 2500 CTD HO, 6-speed 214,000 miles and still going strong
