I had an Algon injection for a 331 Chrysler hemi that had adjustable nozzles. They had a knurled thumb screw knob on each nozzle that you could turn to adjust the fuel flow. It was supposed to be good for pump gas to 25% alky according to the book that came with it. I can't say how it worked since I sold all of my hemi stuff years ago and never run it.

Tom

Building a '69 C10 short stepside mild custom.