Comp Engineering Frame Rails - help

[67FirebirdKiller]

So I'm about to start all the weld work on my 67 and purchased some Competition Engineering rear frame rails and I know that some floor/trunk modifications are necessary but these rails don't even look like they were made for the car. For starters i bought them from a guy off CL who was building a 67 himself and gave up. I included a pic of the rails, can anyone tell me if these look right? I spent an hour or two searching images and forums last night to try and find exact rails and since i cant, im led to believe these are not the correct ones. Thanks for any help!



They dont sit flat on the flat trunk pan area, its a tapered gap from the last bend to the rear of the car, goes from 1 inch to like 6 inches.