Standard EFI ECU probably won't cut it for a turbo conversion. Facotyr turboed EFI RB30(VLs and Skylines) are good 'cos the ECU or the addition to it is pre-tuned for the turbo. No question EFI is the best way to go for a turbo, as long as the right ECU and extra electronics are employed.
The places to gather all the information are Skyline and Bombadore forums. Because many young nuts have been playing with the VL & R31 turbo conversions, there is plenty of information on those forums.