Hi Dave, Interesting what the level of lift on the cam is - I've just checked both of my applications and have found the following comparison -
a 35/75 - 75/35 cam of 290deg duration gives 7.25 of lift at the cam lobe.
a 40/80 - 80/40 cam of 300deg duration gives 7.70 of lift at the cam lobe.
both of my cam's are of italian origin but I'm sure that there will be many different timing arrangements available. I also have a cam of unknown origin somewhere - I must measure the lift sometime -
Get it on FleaBay
Ian.