I agree with the mortdk, if you want to be big you gotta eat. But make sure its good, whole foods. Trust me, I dirty bulked running Boring But Big once, and I am still paying for it to this day. Got big and strong, but also slow and fat.
And like mortdk posted, probably best to do your high pulls (when doing them in any manner) before your squat or deadlift.
However, since you are running Boring But Big I would either keep them very light and just work on technique (as high pulls are a fairly highly technical movement), or eliminate them entirely. Your body will already be taxed enough as it is, and the point is to put on mass and get stronger. Not run yourself into the ground and get nowhere. Personally, I would just run your program without the high pulls.
Another suggestion I have is if you enjoy BBB you could always do the Boring But Big Challenge. Its I found it quite a bit of fun. I ran it once and had success with it. It has everything written out beginning to end from lifting, to conditioning, to how to eat. If you Google it make sure to follow it as written and enjoy!