Hi, I found a guy that has two model #39M superchargers for the Ford flathead. One is chain drive and the other has the belt pullys. This guy want's $3,000. for the pair so he knows the value. My question is... Besides the fact that they look cool, do they really increase the horsepower at all and what other changes would I have to make to my flathead to run this set-up? (Kiwi Kev) I know you are running one, any feedback? Thanks.