I know it is a little late for this... but I saw a 250 with the same M90 you have. He had it mounted on the passenger side and the carb on the back, similar to yours. The supercharger was mounted upside down so that the outlet was facing up. He had a flange on it with a 3" tube that went ovet the rocker cover and into the factory intake manifold using a flange! Thing looked AWESOME! Took about 25-30 seconds of cranking to get it to start... long way for the fuel to go! Cool-as, though!
My M90 is from a Buick Regal GS or similar!
Looks really cool Leaded!
