To remove the crankshaft pulley on my SBC 305, there are 3 bolts in a triangular pattern and 1 in the center. I was thinking the one in the center would not have to be removed, but now I am thinking I must be wrong. What is the best way to keep the crank from turning while removing that middle bolt? I have the other 3 bolts off right now, nowhere to hold to secure the crank while I loosen the middle one. My crank pulley split clean through on me, never heard of that happening before.