Help! I have a 1966 Mustang 3.3l straight 6 that I am in the process of rebuilding, and I am stuck now trying to remove my harmonic balancer from the crank shaft. I have a puller but that isn't where my problem lies. I cannot get the bolt to turn and come out of the crank and I cannot find a harmonic balancer holder to keep it from turning the crank as I try to loosen it. Along with using my 1/2" impact I have tried the belt trick, and also using hardened bolts and a pry bar to try to hold it steady. All I accomplished was bending the hardened bolts right over. Should I try buying a 3/4" impact to see if the extra "kick" knocks it loose or is there another option?