Is your car a 2 door or four door, convertible?
An A pillar is where a front door would bolt to, b pillar is a center post on 4 doors, or lock post on on a 4 door Hardtop, sedan/ wagon, and hard top, C pillar is rear door lock post, (some would call the dog leg portion), or may be considered to some as C pillar , but the structural parts that the doors attach to either by hinge or by door latch are those pillars. On a wagon, behind rear Qtr. glass could be considered D pillar.
A "K" member? is more of a Chrysler thing, a bolt in engine cradle, where just a front cross member on a B Body, would be under the engine and is a weld on/in item, so frames are mostly the same outside of convertible?
And need to know what body you have, 2 door hard top? 2 door sedan? 4 door hardtop, 4 door sedan/ wagon., or Convertible.