If you have the cluster in. Double check instrument panel connections and wires. Speedometer cable. put the bolts on the a pillar to sit the dash on and swing it up. I think your there. Brake switch?
The 2 studs for the column will be in the way , they go in after the dash , I install the side bolt on the passenger side , lift the dash in & put in the left side dash bolt , then you can install the for in the defrost vents . Make sure the main harness is completely installed to the dash before as well . Do you have the antenna cable routed yet ?
On the dash wiring harness you might want to label (with tape) the radio power wires. I believe the red is for power and the orange is for the radio light to come on with the dash panel lights, at night. The gray two wire plug that I thought was correct, wasn’t (on my car anyway). That way you can avoid laying under the dash with a multimeter like I had to…