I have a recipe that calls for a 7 lb. top round beef roast with full fat cap. You salt the beef for 2 days and then set oven for 450 and roast for 20 min. Reduce to 225 and roast for 1 hr. 30 min. Can I use a beef rib eye boneless roast instead of the top round beef roast?
Yes. You may want to baste from time to time if there's little fat, and ribeye benefits from lower and slower cooking--which you pretty much seem to have here--but otherwise yes. You may wish to check out Ad Hoc at Home, by Thomas Keller, which discusses roasting a ribeye.