Son is building with me helping a Vans RV7. He has in hand a Continental IO360 from a Cessna Skymaster. We both know that the RV was designed and the only engine VANS recommends is the Lycoming. We've asked on the Vans forum page, but didn't get any help as anything other a Lycoming is mostly frowned upon. He is looking for a constant speed prop maybe around 74" for that engine but is not having to much success. Can anyone recommend a prop to use? Thanks Mike B