I don't mean that you just run it backwards- you build it backwards. All you would need is a mirror image front and rear end housing- the middle and rotor housings would just be flip-flopped. Think of a mirror image. If it were sitting in the car, the intake and exhaust ports would be on the left side. It would literally be a mirror image of a 13b. Mebbe it would be called a "d 31"?
Brian Trubee

 
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