I have a hydraulic cam from Bob that I purchased for my Six Pack Bee. Before I got around to installing it, I purchased another for my 440-6 Superbird, which I did install. I am now getting ready to get back onto the Six Pack Bee and Bob told me that the cam that I had would take more converter, which would make it harder to 60' I purchased another cam, which is what he is running now. I would think that the cam I didn't use would be good for a 4 spd or for street use with a slightly higher stall converter than stock? I have the spec. sheet for that cam. The other cams are classified.