[Aubrey N Bruneau]

Rod, maybe I'm over simplifying this, but I think you can get it from reading the "event" timing figures on your cam card ?
An example, with simple numbers out of my head ( this is a single pattern cam ):

Intake opens 20 degrees before TDC... closes 40 degrees after BDC
Exhaust opens 20 degrees before BDC... closes 40 degrees after TDC

You can see that this cam would have 60 degrees of overlap.
Now, if it were ground by the manufacturer, at 4 degrees advance ( a nasty habit these days ), the cam card would read like this:

Intake opens 24 degrees before TDC... closes 36 degrees after BDC
Exhaust opens 24 degrees before BDC... closes 36 degrees after TDC

The 60 degrees overlap remains unchanged... it just occurs 4 degrees earlier in the crankshaft rotation.
Tends to make an engine "feel" stronger, usually creating more "grunt" at low RPM... invariably at the expense of high RPM horsepower ( my experience anyhow ).

So, if your parts are accurate, chain good ( I doubt anyone would be installing a cam with a sloppy chain ), installing the cam, with the timing set at the zero or "straight up" position, will result in your valve timing being in what is known as a 4-degree advanced position.

As Greg stated, to verify this, it is always recommended to degree the cam, using the timing set that will be in use in the engine.