The plot thickens!

Looks like someone has made an effort to deal with shimmey before! That steering damper that's clamped on to the axle and tie rod is often used to compensate for bumpsteer characteristics, or worn steering components.

As for caster, a handy little tool you should have is an angle finder (protractor), see attached picture. $10.00 at Sears, a quick way to check spindle inclination, also good for checking driveline inclination.

Looks like you've got '49-54 Chev front spindles, and perhaps brakes.

The friction shocks should mount to the front of the frame at the ends of that front, suicide crossmember. The arms would reach forward to attach to tabs welded to the top of the axle. If you go to the Total performance site and look very closely at what they've done you can make it out.