crank threads..

[70GMCer]

I learned the hard way buy using the bolt to press in the balancer and it broke off inside the crank. I'll use the tool next time. Now I don't say this is a good idea, but I left the balancer on without removing that broken bolt. The balancer aligns up and have been using the truck over a year now (off and on) without any movement. The early small blocks were pressed on. Although they didn't have the power outputs the newer ones have. I think maybe that's why the bolt is used. You're lucky that you were able to get the bolt out. I'd try re-threading and get a grade 8 bolt as mentioned before.