The old Mickey Thompson made a spread bore plate that did just that. I went to the neiborhood speed shop and they still have them. They are now Cal Custom. I am not sure if the plate can be reversed but I think it can. It raises the carb height about 1.5 inches. This could be a problem in some instances. RC --- "A. Foster" <monkeypuzzle1@xxxxxxx> wrote: > Hello All; > This seams like a stupid question but is there a > way, in theory, to > convert a square bore carberetor into a spread bore? > I am just thinking on > my feet here but could the air flow through the > primaries of a square bore > be restricted to achieve a similar effect to a > spread bore? Would it make a > difference? > Thanks > Best Regards > Arran Foster > 1954 Imperial Newport > Nedding A Left Side Taillight bezel and other trim > parts. > > >