[CREWZIN]

WELCOME to the forum. Just taking a guess at this but sure sounds something else went wrong when the head cracked along with your headgasket. I had two cars that wouldn't accelerate past a certain point and in both, the Catalytic Converter was plugged up. Do you have full pressure out the back while revving in idle? You can't go anywhere near red line in idle because of a rev limiter but should be able to rev up smoothly to a certain point before it cuts out. Could be something else internally also.

Haven't the faintest idea why turning the wheel would make it hesitate.