Rack of ribs + 6 hr drive sitting in the same position??? Kline, that sounds like a recipe for trouble for any poucher let alone a pre-op one...next week, stick to light and gentle foods pre-op...
The kick in the stomach is about the best description that I have heard...you have put your guts under strain for quite a while and they are not at all going to let you forget it for at least a few days...be patient and void the ribs next week...
Sharon
ps...good luck with the takedown.