You didn't state if you wanted to buy a new coach or a used coach? If your buying a new RV then Ford Triton V-10 is your only option and this is for any RV from 2010 to present (there maybe a Big Block Chevy out there in a 2010 RV model that was a late seller?). If your buying a older RV from 2001 to 2009 (Big Block Chevy's were last produced in December 2009) with a Workhorse Chassis then Chevy can be a option for you to buy. I've owned in the past a 99 Fleetwood with a Ford Triton V-10 and I currently own a 04 Winnebago With the Chevy 8.1 Vortec. Both are great engines! I prefer Chevy over Ford and that is my personal choice.