I believe it could be done quite cheaply, using external solenoids and 2 rb25 intake camgears using either head, however it isnt VCT by any stretch of the imaginiation, and tuning two switch on/off points could be time consuming. You may then have to go away and modify the vct mechanism for different angle throw. IMO if you are going to go to all this effort it would be worth investigating a different mechanism say off an evo or mx5, and get true vct, as dirt said the results would be very worthwhile