[Mgs] stuck engine

[Craig]

HELP!
73 MGBGT with an engine that will not rotate. I removed the valve rocker 
assembly, still no spin. although two of the valves were stuck, when I 
removed the sparkplugs, there was ample clearance so the engine should at 
least rotated a little one way or the other. sprayed liguid wrench down the 
plug holes and down the valve stems. Rachet broke while trying to free the 
engine. transmission was in neutral. The engine turned over 9 months ago. 
Could the rings be that frozen???
Any ideas/suggestions would be welcomed.
Thanks,
Craig Holmes
cbhlouky at bellsouth.net