Thanks Neil that is very good news. Let me describe my firewall-forward layout. Mine is a Glasair II RG, with a Lyc IO-360C1E6 engine and standard 6-point mount from S-H. This is 200 hp engine so a little wider and heavier than the typical 180hp, but fits onto the mount nicely. Accessories mounted on back include the usual two mags and vacuum pump, oil filter, fuel pump. Air intake is also in back. Air intake is on the pilot's side...ie the injection servo sits near the firewall, with a 90 deg elbow leading into the engine. Look like the mags are the tightest clearance from the engine mount tubes. I can post pictures if that would help. From your experience, does that set-up lend itself to replacement of the isolator bushings without removing accessories?
Brian