Uplander;
It's always recommended, to have a look at the exploded assembly diagram...(GCP site, see Page 250 for B20 1800, excerpt added below) and the Torque Rod (Item 12, the one with larger bushing on Axle tube end) does indeed have a longer bolt, which goes through that spacer in the frame and Nut on the other side...so it looks to me like remains of Bolt are broken off in that (unthreaded) spacer...I'd have a look at the other side of the frame...it looks like you should find a nut there, which once removed, should allow that bolt stub to be drifted out...
Good Hunting!