Any ideas on how long regular St. Louis cut ribs would cook for?

I would start with the recipe's timing as well as the suggestion to check at 40 minutes. St. Louis style ribs are meatier than baby backs, so they might need a few more minutes (or they might be just fine at 40 min.). This recipe calls for the ribs to be cut into individual pieces before cooking, so that would mean less time than cooking in larger sections. Good luck - sounds delicious!

I cook ribs a lot of different way. My fav easy way is to wrap them in double foil and bake @ 400-425 for a hour and 15 minutes. Open up the end and pour all the fat off. Finish off on the grill or under the broiler. You can add whatever you like ie: rubs or sauce or herbs etc before you wrap them. These fall off the bone!