The Novarossi 46 and 67 Outboard Powerhead are designed to directly mount to these lower units, with a slight modification to allow the header to clear the lower unit when mounted. The 67 requires drilling out the existing engine mounting tapped holes on the lower unit so the screws can pass upward through the lower unit and into the engine mounting plate’s tapped metric mounting holes. Requires the Part# 12425- Mounting Metric Screw Set.