I have the SU mounts and there was quite a lot of drive train noise when they were first installed, I still get a bit of gearbox whine even after having them in for about a month, vibes have settled down a lot though.
When you say you did every bolt as tight as possible with loctite, did you tighten the bolts with a torque wrench, to the specified torque, or did you just go for the popping the vein in you forehead tight bolts, if its the latter you may be experiencing extra vibes due to the bolt torques, sequence and torque are both critical when doing any engine mount on these cars.
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