There should be enough adjustment there to get it correct. Everything reads of the cab, so moving the cab around on the chassis won't improve things. Probly going to need to adjust the entire doghouse back. Do the fenders first, then re-align the grille/core support, the hood last. Try that first, rather than adding to the fender length. I know that these TF trucks can be a pain to get the panels aligned, just be patient and take your time with it. Beleive me, I've done it more time than I really care to admit. In fact, I'm in the process of doing it again, as I'm having to do a little collision repairs to the '55.