Tom,
If I'm going to use a cam - even new - I measure the lobe lift on every lobe. As a quality check on the new ones, but as a wear check on used cams. As a byproduct you now know the intake & exhaust lobe lifts which is a huge hint to finding what cam it is. All you need is a 1.5" mike.
Now, if it's a HUGE duration cam this method wont work any more as the sides are no longer on the base circle. Usually you can tell by how fat the cam looks. In that case you'd have to shove it in a block and degree it, still not that bad. You don't really need a crank and timing set, you can get durations and LSA with just a wheel on the cam and a single lifter.