1975 7GCBC, I've suddenly developed a right wing low attitude in flight. Along with new vibration through out the airframe. I thought maybe it was a fuel issue but with full tanks to make sure its balanced it still does it. With ball center and trimmed for level flight I let go of stick and it instantly starts a right turn with it progresivly gets worse. I have new airframe vibration at all RPM settings. Both left and right struts vibrate. Engine checks ok for mags, spark plugs etc.
Any ideas???
Any ideas???