Yes, I had the same problem. It drove me nuts for a week. If you notice its a shoulder bolt. What you need to do is put the closed end of a box wrench on the bolt. Then tap with a hammer as you try to screw it in.

As you tap, put pressure on the bolt with the wrench and tilt it towards the side you need to center it in the hole.

Mine too was a 70 RR. One side went in well. The other side needed the wrench and hammer.