Pros and cons of 'solid' engine mounts

[cnhss1]

im looking at replacing my cars 'bobbin' style Ford rubber engine mounts with something more solid to stop engine moving as much. This is primarily due to much larger than std diameter turbo downpipe and exhaust system and very little room around it. At rest it all clears but only just and dont fancy the engine moving and snapping the manifold/studs/turbo etc if it does move enough to catch the chassis rails.
std mounts are some ford (capri??) round rubber jobbies, 76mm diameter, 40mm thick with M10 studs in.
i can get ally ones made dead easy, but cant find a polyurethane version as yet as thought they may be less 'harsh' than a solid one. car is a mod prod hillclimber so not worried about noise, just worried there may be a downside to going to solid mounts.
my other thought was to slip a tight fitting tubular sleeve over the outside of the mount to stop excessive squidge, anyone ever done this?
Your thoughts please Gentlemen....

[cnhss1]

ok, thanks for the ideas, will try the stabilzer route i think.
something like a tie bar with rosejoints either end?
ive seen 'damper style' ones on jap stuff (often very bling) but doubt this will overcome the torque reaction and ultimate movement but may reduce vibration and harshness. any ideas?