Just a few thoughts that come to mind. But be aware that while I've done 5/3/1 before, I'm still pretty much only just
an intermediate lifter, as far as I can tell.
I know what I'm talking about here, heh...
1. I recommend doing BBB the other way Wendler suggests (i.e., with the BBB sets swapped around, so day 1 would be press 5/3/1 followed by bench
2. If you can't do even 1 chinup yet, I would work on that immediately
. Try slow, controlled negatives until you can do 1 rep, then keep doing singles whenever you can - all the time, basically. Work towards 2 reps, and so on. But sure, also
do pulldowns for now.
3. And lastly (as well as least), I'm not sure side bends are the best supplementary lift for deadlifts. Maybe just a standard issue abs exercise instead?
Oh, and so-called "Kroc Rows" are just a single set with a lot of reps, after a warmup. Not 5x10, say. For what it's worth - personally, I think the interwebs have gone crazy with all these cutesy little names for basic lifts, with some arbitrary specificity tacked on...
So yeah, it's "DB rows".
edit: Also, I would look at the "Beyond 5/3/1" book, in case something takes your fancy there. There's a ton of different approaches and options, some of which are great, IMO.