Hi Hans, I think the drawings for the mounting plates are in the documents section of the yahoo site for the Vega. They are specific for the engine bed of the Mark 1 to the standard Beta mounts and are, from memory,intended to bolt on top of the original bed as adapter plates. As I found out, however, my engine beds needed rebuilding due to oil damage and corrosion - something I suspect a lot of older boats could suffer from as well. In hindsight, I should have constructed a specific bed to suit the Beta directly which would have left more space on the underside of the engine. Not a big problem, however. The oil extractor pump needed relocating and the beds required notching to allow clearance for the bellhousing.