Steering Problems - HELP?

Aside from oil on my plugs and the shop telling me a new head gasket - now I have a new dilema.

When driving the car has always pulled slighly to the drivers side left. Perhaps I thought the calipers were tightening on the breaks, but this happens not when breaking.

Now, the steering wheel shakes or shimmies back and forth when driving causing extreme vibrations at low and high speeds. The car runs like heck!

Is it power steering, is it alignment. Can someone offer some help?

alignment

alignment and possibly wheel balance( for the shakes)

out of balance rims ,, wheel bearing shot,,rotors out of round ,,broken belt in tire,,check those items first. also take a look at the lower ball joints if all of that is ok post again