If you mount the blower up front and crank drive it and put the carb in a pressure box it will work but it is sort of like using bag pipes to power a pump organ. WHY is the big question when the other way works so well. As for a manifold and conventional mounting carb over blower, , mill the stock four barrel manifold flat (so the bllower will mount flat at exactly 90 degress to the belt and the belt will stay on) and bolt a plate to the carb flange then bolt the blower to the plate. 3/4 in aluinum would be fine I believe. I built a set up for a Dodge Colt 1600 using a magnuson blower in the seventies, long before magnuson thought of selling blowers for hi perf use. I have pics of it. It worked pretty good too.