I just put mine on 3 days ago. I removed the grill, radiator and fan, I heated it up in the oven at 200 degrees, then I placed it on the crank and started pounding it on straight with a rubber sledge hammer, then after it got it started straight I took a metal 5' digging bar and placed it with one end against the harmonic balancer and the other end going through the grill area then I had my wife hold the end of the digging bar against the harmonic balancer while I hit the other end with a sledge hammer the balancer was seated all the way in.
Only reason why I used the digging bar is because there is not much room to hit that balancer with sledge hammer while the radiator support is in. The digging bar went through the radiator support area allowing me more room to swing a hammer
also don't hit the outer rubber area. just hit the inner metal ring. Put something over the metal part of the balancer to protect it from damage
