I don't think you will have any problems. The front chainrings are not as critical as the back. If you are really concerned about it, buy the Campy cranks from a place you can return them if necessary. Measure the gap in millimeters betweeen the 39/42 & the 53. Chances are it's about the same. If it's way off, return them.
I have ridden on 180's for many years now. I have talked about longer cranks in great detail in other posts. Studies have shown riders go faster on longer cranks no matter how tall they are.
Many pro riders increase their cranklength for important events like time trials, climbs, and hour records.
Good luck with the cranks!!!