i have a 94 s10 blazer with a 4.3 vortec in it. the motor is locked up from sitting for a year and i was wondering if yall new any tricks to free it up. ive been told that i need to take the plugs out and spray some pb blaster or some marvel mystery oil in. has anyone ever tried this or know another way of doing it? ive already tried to turn the crank with a breaker bar, it wont budge, i took the belt off and all, nothing.