Kiefer also mentioned when density bulking you can eat pizza, ice cream etc and the trashier the better. The original poster was about putting on size and losing fat. I've done both density bulking every day. I just keep the off days clean eg. rice, potatoes etc. Everyone is different I guess. I'm not trying to be Kiefer just giving an example of what has worked for me so far. From what I can tell this isn't a one size fits all plan. You have to experiment a bit.
I'm all for experimenting, but I have seen time and time again that when smaller guys like the original poster eat a lot of junk they put on fat. Kiefer has said several times in podcasts that this is true. You have to realize a lot of the junk food recommendations in CBL is sort of marketing. All Kiefer really says about the trashy carbs is that they can be functional, not that they should be used exclusively. If you read CBL carefully, you will see that Kiefer says on page 220 in the FAQ section that you should ideally not backload exclusively with foods high in sucrose or HFCS. Nearly all the carbs in Ice Cream come from HFCS or sucrose.
Also the original poster does not need to do Density Bulking to gain muscle, SA will do that fine because he has a lot of room to grow and does not need a massive amount of food for muscle growth. Density Bulking would likely cause fat gain, especially in the manner you described. I have run Density Bulk successfully for a combined 11 months so I am rather well versed in the protocol.