Hi,
I'm running the 1.8VVC at present with the 1.6 fuel pump unit - no problems. Not sure how the pump would cope with 2.0L? I have no experience of this but guess if it is providing enough fuel and running OK then leave it.
If it helps I had problems when I built my car getting this pump unit to seal. The fuel seemed to seep up the threads on the fixing studs / screws and then sit on the top and around the seal. I ended up stripping the pump from the tank, degreasing and cleaning / drying....reusing the existing seal but liberally coating both sides of the seal and the threads with red hermetite sealing paste; then reassembling. It has never leaked since....not even a sniff in 9 years!
Rich
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