Stovebolt Engineering has been selling the holly/weber progressive 2 bbl with an adapter for the 235 for many years. I have not read many (1-2?) complaints about the setup. Most comments are quite positive. I do know that Tom Langdon (Stovebolt Engineering) does not recommend the Holly/Weber for the 292. I would call Tom and run your engine build by him and see what he says.
Larry
