HAs anyone recently overhauled an O-320A lately-to standard specs? If so, I'm wondering how much you've spent? The engine has about 750 hours on it and the compressions are near the 70s on all cylinders. Any othercomments on this engine would be appreciated. The other choice is an O-290G with a "certified converstion for aircraft"? I'm hearing from my A&P, "Don;t even think about the 290-It's expensive to difficult to find parts". If money were such a concern I'd still be flying RCs.