I grew up with a Mazda man for a dad. The list of Mazdas my family has owned between myself, my parents and my sisters. R100 RX2 RX3 RX4 RX7-3 of them MX6 Millennia protege -4 of them Protege 5 The first engine in my 36 Ford was a 12A with a 4 speed behind it. I have always thought the Wenkel design was ingenious. I have plan someday to install a 13B turbo engine into a model A roadster. I know there are more efficient power plant options out there, but I like em….. anyone else?