I looked seriously at Beta, but they are a very tight fit which means minimizing sound insulation over the top of the engine and the B38 I was looking at is a 3600 rpm engine which I definitely don't like. The Beta 43 would be a good choice, but it is 2" taller than the space it has to go into. So Beta is out. I have considered Beat, Nanni, Phasor and Universal (all Kubota engines). I also looked the various Mitsubishi based diesels (Vetus, Westerbeke and a spanish company whose name I can't recall right now). In addition I have considered Yanmar and Volvo. After way too much calculation and consideration I am down to the Westerbeke 44C and Volvo-Penta D2-40. That is why I asked about them. The other engines are out of consideration