I do have a question regarding the Pitman you replaced? The pitmans on 69's with P/S are non wearable... The joint (pitman) is on the center-link (drag-link). People in the past have attempted to swap them out with camaro parts or 67/68 pitmans this will result in large scale steering issues.

I've run 3 different set ups over the years and finally have her dialed in now. For a front spring I was a strong fan of Hotchkis but fell out of love with them over the years. I ran their 2" drop in the front and 1.5" drop in the rear. The front springs are a progressive rate coil (same a eibach). This means that the more pressure you apply you will get varying rates of resistance. I found that this allows the vehicle to bottom-out a lot easier and makes it a bit unpredictable in turns. Needing a change I switched to global west springs. Their springs are constant rate and leave the vehicle with a great ride. I enjoyed their products so much that I got their upper control arms to match. The final change that I made and am currently running is viking double adjustable coil overs with global west lower arms. Short version... check out global west products.

When it comes to my bird I drive the wheels off of it in the corners so I am a bit more aggressive than the average weekend cruiser. I have run many different set ups and The single biggest change that I have ever made has been buying a delphi 600 steering box! It is worth the $. It makes the car respond as if it is a modern muscle car. Tight steering with positive road feel.

Finally, PLEASE PLEASE PLEASE do NOT let anyone talk you into the guilderstrand mod. It involves drilling out new points to mount your upper control arms too. This is a permanent change to your subframe that can't be undone. Good quality upper control arms (hotchkis, global west, detroit speed, etc..) change the needed geometry for the needed (+6) of positive castor. This mod was from an age when arms were not redesigned on cad programs that change vehicle geometry.