Model a ford OHV conversion. Never used. Bought years ago directly from Mr. Jern. You may have see his other adapters for Model T. All parts in the picture are what you will receive. The craftsmanship is unreal. Totally unique. Recent research shows Mr. Jern only made approximately 100 of the these conversations for Model A Ford. Unfortunately Mr. Jern passed about 10 years ago. If you need a 28 Chevy head I have several.