I want to upgrade my engine vibration isolators on my 1993 RV4 that has a conical 0320 B2C. The bird has 600 hrs on tach and 700 hrs hobbs and the rubber "biskets" have never been replaced, quite a bit of engine sag showing. I have reviewed the archives and see that the Lord mounts are reccomended - Vans offers them with the bolts for $600. Anyone out there in RV land made this switch, was it worth it, did they fit?