Not sure how to do that with two pipes, putting the engine at any other point would be the same regardless of where I attach it to the two pipes, ha. 
EDIT: I guess I could use three pipes and attach it to the middle one?
Not sure how to do that with two pipes, putting the engine at any other point would be the same regardless of where I attach it to the two pipes, ha. 
EDIT: I guess I could use three pipes and attach it to the middle one?