Cam advice for more torque from 340

The height being the same simply says that the lift is the same; the duration can be quite different. And we don't know how you are measuring the height; the 'height' of a lobe peak versus the rough cast core has no meaning. It is the height variation of the lobe peak (toe) versus the lobe heel relative to the center axis of the cam that sets the lift. The way Crackedback explains the measurement will get you close if you are accurate and use an accurate caliper.

And I doubt you can pick up the duration differences with the eye, unless you have looked at a lot of cams! Even then it would be tough for <20* difference in duration, because the shapes of the cam lobes before and after the lobe peak (the ramps) will be quite different for different cam series'.

Why fume about it? Without taking accurate measurement data with a degree wheel and dial indicator, you can't know what the old cam is just by looking at it. At least now you KNOW what cam it has. The 'Z' sometimes shows up in Crane cam part numbers, but I have not been able to find a 'Z016' cam ID.

The cam keys usually are a tight fit (interference fit). Use a small drift or chisel from the back and tap it out of the slot in the old cam.