Choosing the right stroke for a 340

...best stroke for what?
Mileage, torque, street fun, 1/4 mile , circle track, cruising, tire smoke....
There is no perfect canoe.
Or maybe there's a few? If you're running a b-body satellite sport which is basically a roadrunner body, a 4-in stroker is kind of a no-brainer with that kind of weight it really works against the shorter stroke combos that would really shine in a 3000 lb car.