That is interesting about the tb's, I haven't considered getting a bigger one, I am not sure if I need that with were i live and what I am doing on a daily bases, but I have just recieved my Crane cam and will try and show you some pictures of the lobe differences,how do post pictures anyway, they are 2 different cams all together now but I didn't like the split duration cam at all just no power were it was supposed to be.
I will have this motor in and going by the weekend and will let you know about the difference in power I have got.