[ls1nova71]

I don't know if you've done this kind of work before or not, but it makes me cringe when I see a Blazer tub off the frame without any kind of bracing done to it, especially one with any amount of rust. Being as you have the rocker panels removed too, this thing is probably trying to fold in on its self. Not trying to be a dick, just letting you know. Even a non rusty one will move more than you think. So, before you start welding in panels on this thing, you need to get the header panel welded back in, get it back on the frame and put the top on it to make sure everything is going to line up properly. There would be nothing worse than putting a new bed side and rockers on it only to find out that the top wont fit. Don't rely on just the fact that you make the doors fit, because they can be made to fit even when the top wont. Good luck with the build.