I am considering the purchase of a Varieze sans engine. It used to have a C85. I understand other models use O-200B (pusher). I gather other variants of the O-200 (e.g. A or D) cannot be used, because they are "puller" type engines rather than pusher.
Problem is, O-200B is not easy to find.
I am wondering why the puller type engines can't be used, just turn the prop around. Simple. Maybe too simple? Maybe someone can educate me on this, thanks.