340stroker engine combo help

Also what 388dart said. The Edel. heads are advertise to flow well up to .550 lift with a few cfm gain (2-4 or something like that.) to .575 lift.
Ported heads if done right could do the trick, but with a long duration cam and big, for the head lift, these Edelbrocks may not be up to task.
The second cam you list seems more suited for the cars weight and gear ratio, though a little heavy IMO. I'm a bit heavy with cams myself. It's also easier to get away with a 4spd manual. Which I have.

Also, with strokers, the sheer size of the new displacement, a clear 40 cubes bigger than the biggest stock small block, eats up large cams and makes them a bit more docile than they read on paper. It also shortens the RPM range because of it's size. (Stroke) Thus the reason 388 stated on not spining up high in the rpm range.

At 388 cams suggestion, in a Duster with the engine combo, I would say this would be a great mix of parts. With the heads ported out, but not race ported, will do.

You want a cam with the duration to suite driving cruise RPM or race track needs, as in RPM limit, to work in concert with every other part.
Get as much lift as the head can handle before the port stalls.
Then thats as much cam as the heads and engine combo can handle while makeing the best effort on the engine.