Sew, I tried McCall's Classic Fit #2818 FW (18-20-22) and I survived, nearly. If you're not familiar with the pattern, it's a cute princess seam semi-fitted top with a back button closure. The pattern was particularly appealing because it promoted "Learn to fit a full bust".  Sounded like a promising place to start.
 First step in choosing a pattern is to fit either your bust measurement for upper body - like tops and dresses, or your hip measurement for lower body - skirts and trousers, etc. I start looking for patterns to fit a 48" bust, and you should know that  I am nearly always falling in love with patterns that are just shy of what I need to cover my girls AND I love fitted and semi-fitted clothes. This means altering a pattern to fit the most challenging part of our anatomy - the bosom. And, I needed to come up with 4 inches. Should I also remind you that I am petite - at least in skeletal structure, and this means that I have to get rid of 3 inches. Sew, follow the math:

                            +4" horizontal /4 -3" vertical * 4 = 12 hours and one messed up pattern

Just because I love math doesn't mean that I'm good at it.

My muslin is pinned to my dress form - her name is Maria if you're interested, and it's in two pieces  - Maria looks good in it, maybe if I add a zipper in the back and a zipper in the front it might work. Sew, I summarize my attempt at #2818 as follows: probably won't make this top, but I might finish the muslin Maria took a shine to.