Kegger carb adaptor
just because something's not available to purchase ready-made doesn't mean it won't or can't work. If you think about how much it might cost to tool up a factory to do a production run and produce a few thousand of this kind of adapter and then consider how few people would actually want to buy one then it's clear why they aren't available, it would be money down the drain. build it yourslef, If it works well then you have a talking point whenever you open your hood, along with the satisfaction that you've used your hands instead of your credit card. This was how hot-rodding always was back before it became normal to trick up your car with a myriad of store-bought parts out of a catalogue.