I have taken mine apart and all I'm left with (that's any good) is:

front clip
roof
dash
RH rocker
interior components
other small components
even frame is no good

I've done my research for the last 13 months and if your just doing patches it's fairly straight forward but once your into full floor, rockers and frames the cost goes up by 3.
Most of these projects fail at that point because they have difficulty aligning the floors with the quarters and the trunk pan. You can get a complete floor to trunk with frame for $2800 but you still have to stitch it into the existing body.
I have followed a lot of threads and they fade to black when they get to this point. With the right equipment it can be done but a project that does need a full pan and frame is cheaper. These cars can be bought for less than $5k. Craig got a car that's pretty rough but only needs patches for less than $2K. And it's nos. matching 400/4sp!