Indent between breasts and my ribs stick out more on R than L? Possible to have implants done? How many cc's for frame? (photo)

This body build does not mean a woman cannot have implants. The breasts are widely spaced, and the space between the ribs is somewhat depressed and will certainly be accentuated by implants since they will raise the medial breast border, making the depressed space between the breasts look more depressed  than if the breast bone was flat. Other than fat grafting this area, if there is sufficient fat to do it elsewhere on the body, this appearance would be something you would have to live with. The location of the implants is lateral to the pectoralis orgins along the sternum and this barrier cannot be transgressed. A wider low profile implant, not too big, could give a gentle, slower rising breast augmentation appearance. The implant may not cover the ribs that extend lateral to the breast base on frontal view, but this is OK, the augmentation will still look good. In this particular case, it appears that the lateral border of the implant will extend outside the outline of the ribs, giving more of the classical ideal appearance of the breast with roundness outside of the line of the ribs on front view. Size is up to you and your plastic surgeon, based on your breast base measurement, and size preference.

Chest wall abnormalities are very common.  They do not make someone a poor candidate for an augmentation but they do affect the end result.  The chest wall is the foundation the implant sits on so asymmetries between the breasts are more common if the foundations are different.  You appear to have a harder than average breast augmentation given your current size and chest wall.  I would recommend seeing a board certified plastic surgeon for a individual consultation and recommendation.  Regarding volume it really just depends on your desired size and something which would be determined at the consult after you try them on.  Given your chest wall, protruding ribs and current cup size, I think you would dramatically benefit from a breast augmentation 

Thank you for the question and pictures. No, I do not think that you have any physical characteristics that  may prevent you from doing well with breast augmentation surgery. Often, breast and/or chest wall asymmetry can be improved upon with this operation.  Although difficult to tell from your pictures, the “indentation” that you describe is likely a pectus excavatum physical finding. Often, breast augmentation surgery can serve to “camouflage” this indentation.  I also think that given your body type, you will do best with the use of silicone gel breast implants ( as opposed to saline).Generally speaking, the best online advice I can give to ladies who are considering  breast augmentation surgery ( regarding breast implant size/profile selection) is:
1. Concentrate on choosing your plastic surgeon carefully.  Concentrate on appropriate training, certification, and the ability of the plastic surgeon to achieve the results you're looking for. Ask to see lots of examples of his/her work.

2. Have a full discussion and communication regarding your desired goals  with your plastic surgeon. This communication will be critical in determining  breast implant size/type/profile will most likely help achieve your goals. 
In my practice, the use of photographs of “goal” pictures (and breasts that are too big or too small) is very helpful. I have found that the use of words such as  “natural”  or “B or C cup”  etc means different things to different people and therefore prove unhelpful.
 Also, as you know, cup size varies depending on him who makes the bra; therefore, discussing desired cup  size may also be inaccurate.
 The use of computer imaging technology may also be very helpful during this communication process.

3.  Once you feel you have communicated your goals clearly,  allow your plastic surgeon to use his/her years of experience/judgment to choose the breast implant size/profile that will best meet your goals.  Again, in my practice, this decision is usually made during surgery.
I hope this (and the attached link, dedicated to petite patients) help. You will also find a page dedicated to pectus excavatum patients on the same website. Best wishes.