Need advice on rust issues on a 68 Panel

[68PanelTruck]

Thanks Richard for your reply. For the past few months I have been reading many of your posts before I was able to register here and have learned a lot. I have seen some amazing work done here by some members and sometimes when I'm frustrated and think I'm over my head, I see a post that shows that it can be done!

I am planning to order a Blazer floor but you said to get a 2wd. I have a c10 Panel with a big block and 4 on the floor shifter so I was told I needed a hi hump Blazer floor. Sound right? I'm planning to get it from GMCPaul. I would also leave the lip as is. If you could get a pic of that extra step-up, that would be greatly appreciated! No hurry. From what I can see, it doesn't look too hard to fab up a new one out of a piece of heavy gauge steel.