A stock 32/36 off a Escort or Cortina will handle the boost fine with a few minor mods. I modifyed the secodaries on my Gemini years ago cant remember exactly what I did it involved welding a lug on to operate the second throat and removing all the vacume bits like the actuator ect. I used a holly fuel pressure reg a pump from a 13bt Mazda luce and the webber carb for my setup was all good once I sorted all the teething probs. Should probably upgrade any rubber fuel hoses aswell seen as there will be more pressure. As for the floats make sure they are plastic ones not brass the brass ones arnt as strong.