Itt: We talk about rear cross sills

[Ochre]

looking for some input and pics if possible of rear sill repair.

I was considering buying this:
http://www.carolinaclassictrucks.com...ody-parts.html
or this:
http://cgi.ebay.com/ebaymotors/71-72...QQcmdZViewItem

My rear sill and rear bed is badly rusted out...if it was just the top I'd probably go with a flat patch section but the sides are getting really thin. I got a rear bed patch panel to cut and fit over the rear sill once I settle on a way to repair it, and for the amount I can buy a rear sill (as linked above) I'd just as soon save my time rather than sectioning in some U-shaped channel as I suggested in a post a few days ago.

So, is the pickup rear sill identical to the blazer rear sill, or is some modification needed? Anybody actually graft in a full rear sill? Pics? Advice?