1970 C30 resto-mod-oration

[hgs_notes]

I'm guessing you mean the shaft that the steering wheel is on is pulling out and not the whole column. There must be a part missing at the bottom end of the column. I think there is supposed to be a collar or spring clip that holds the bottom. But I also think the upper bearing should hold it in place also. If you take the steering wheel off there should be another nut under there that is over the upper bearing. The whole thing mught be shot and need replaced though.

Now if the whole thing is moving in and out, there are 2 boults under the dash that tighten down to clamp the column to the dash and there is also a small bracket on the firewall under the hood that is bolted to the firewall and has a strap type clamp on it to hold the bottom end of the column.

As for rain leaks, might need to see if the caulking in the drip rail is gone and its rusted out there. Fairly common problem for severely rusted cabs.

Not surprised with the lack of power. That small block may run smooth, but many of them were smog motors swapped in from mid 70's or later trucks and were gutless. Plus its trying to move 2 trucks down the road with a huge aerodynamic profile. It also depends on the axle gearing. Good luck man. I think you're going to need it.