Sounds like a lot more work than first thought. As you said i would like to keep the 5th injector as it is quite a unique car.
What supporting mods would you do to get the most out of the engine as is? You were saying they tend to run out of fuel due to the small injectors, if i was to upgrade the injectors, new fuel pump, tidy intercooler and possibly a link or chip+tune. Should this improve the performance. Not that it really needs it, but you know what its like once you get that bug ;D
The missus wants to give me a race down the strip once our cars are both up to scratch so i need to make sure i dont loose ;D
Also you said the 5th injector doesnt do bugger all, is there a way to get this working? Assuming it would make a difference?