vac and freezing will not affect the texture. at those temps all catalytic and enzymic activities are stopped. you just have to be careful about when you dethawing them. how quickly/slowly may cause a texture change. but I'm not a 100% on at what temp or rate. Best way to dethaw would be sousvide in a circulator (but I don't know how much salt you have used, and what kind of salt). If no salt then maybe you could then low temp for 72hrs. at 59*C (?), I'd have to look back at another forum where I read about how they do it a Momofuku. I did 48hr and 59*C and then deep fried them but I was lazy and didn't l freeze them before frying and also I don't like the fat like it was, kind of globby before the fry. 48hrs was not enough time to render the fat. But I did a side experiment of just deepfrying ribs and holy guacamole I love deepfried ribs.