As you know, the stroke of an engine is a function of the crankshaft ONLY. The stroke is the distance that the piston moves in the bore. The stroke has NOTHING to do with the length of the rod, the rod only connects the piston to the crankshaft.

A "stroker" is slang for any motor that has had its stroke changed. IT can be "stroked" or "destroked".....destroked meaning that the stroke is lessened.

A 350 Chevy has a crankshaft with a stroke of 3.48 inches. If someone were to put a longer stroke crank in that motor, the diplacement would change. A 383 is a common "stroked" 350 size since it can be accomplished with a crankshaft from a larger displacement 400 chevy engine......i.e. easy to do and relatively cheap.

hope this helps