1911 ramped barrel

How is the barrel you have not "efficient" enough for you? If it ain't broke, I wouldn't try to "fix" it.

I think the answer to your question is probably going to be directly related to what you mean by a "ramped" barrel, and what brand you are considering. You might be looking at a drop-in, or something requiring machining of the frame.

The list of reasons to customize a gun is long -- and quite a few of them have nothing to do with making a gun more reliable or accurate.

Installing a barrel like the one pictures involves more than "a bit of frame shaping". It's a machining job requiring precise fitting, not a cheap job or one suited to the amateur gunsmith. Done incorrectly, it can turn a perfectly reliable gun in to a disaster.