Yup the 185 rail has approx half the cross sectional area of the 205 rail. The MR2T guys bore it out....going dual feed rail is another common fix. An interesting option is to go with the 3SFE (or is it 5SFE, can't recall off the top of my head) rail as it is large bore and top feed and fits with minimal mods. Gives you access to a heap of injectors sizes.
If you have a burning desire to see what others have achieved drop me an email and i can probably dig up a dyno sheet or 2