I wouldn't run anything less than a standard vr6 front engine mount. For the conversion I used corrado vr6 subframe, front cross member & rad mount, everything just bolts straight up it's easier than easy. There is always a corrado vr6 being broken on ebay.
For the front engine mount on my mk2vr6 I started with a mk3 vr6 front mount. I bought a large polyeurethene chopping board and used a circle cutter to cut out discs of the chopping board. (you can also use hockey pucks) I took the mount apart, cut 2 x slices of about 15mm from the original rubber which were used at the top and bottom of the new mount. Filled the space in between with the polyeurethene discs to required height.
I haven't had any problems having run the car for 15k+ over two years. It's stiffer than standard and there is no cabin vibration having used two slices of the original rubber. I did the same thing to the rear engine mount which has to be taken apart and reduced in height by 20-30mm so bonnet clears the engine. Best bit is that it only cost £2.99 and does the same thing as engine mounts which cost £200+ for a set.
Wiring is the hardest part of the swap. The mechanicals are simples.
For the conversion I used corrado vr6 subframe, front cross member & rad mount - always a corrado vr6 being broken on ebay.