Purchasing Repair panels, have a few questions

[Smallz72project]

So I am going to be putting in an order with Goodmark Industries for my repair panels for the cab of my 67'. I know that I need outer and inner rockers, cab corners, front and rear cab supports. I know that the front portion of the floor needs some work as well as well as the kick panels where the vents are.

My question is, I see that Goodmark has whats called outer floor extension. What exactly is this. Is it just the first few inches of the floor right by the door and includes inner rockers or would you have to put inner rockers on as well? And then I am a bit confused on what panels exactly I should get to repair the front floor and kick panel area, should I just get the kickpanel, front floor, and pillar. Im sorry for the seeminly ignorant questions, just want to make sure I get all the right parts because I am doing this alone and know no one personally that has ever repaired one of these cabs. Thanks in advance and keep on truckin

Todd