I emailed superchargerUSA and Dyers blowers. I got a really good reply with pictures from Dyers so thier customer service seems to have the goods. Does anyone have knowledge of the quality of thier products?
They are local to me and have been around for over 20 yrs that I know of maybe more. Since they are local just about every car with a roots blower around here is running a dyers. My old neighbor had a 871 on his 4 bolt main 383 sbc. It put out enough power to split the block. In the 4 years I lived next to him he never had any problems with it.