I'm looking at a used RV6 that has about 1100 hours on an O320-H2AD. I haven't seen the plane or logbooks, so I don't know any particulars. But Google says that engine model had a lot of problems when it was introduced and that it was only produced for about 3 years. That concerns me both from a reliability standpoint and a maintenance / spare parts standpoint. Would appreciate any input about this engine and suggestions as to whether I'd be foolish to buy an RV6 with this engine in it.