Hi richard
thanks for all your help.
I'm currently still on standard fuel injectors as their duty cycle is fine. As for their capacity, well the general consensus in the RS owners club is that they are 450cc. Ford aren't too forthcoming about them for some reason and, although someone flow tested various fuel pumps, no-one has done the injectors.
I'm arranging a fuelling tweak with my mappers and, if duty cycle does become stretched, then I have some RC 550cc fuel injectors sat in my garage.
As for the conversion - the engine is almost there but there's still far too much excess weight in the interior to chop out
