core support replacement question...

[badform]

Soo... I think I already know the answer to this, but I figured I should consult the experts anyway.

When I looking for a new radiator, I stumbled onto a good deal and ended up getting a core support to replace the rusty one in my truck. Is it possible to replace the core without removing the fenders?

If the fenders have to come off, I may hold off on replacing the core until I get better fenders and inners as well, then do it all at once, along with the springs. Right now I just want to get the truck running again...