To create a 383 stroker, you'd start with a suitable Windsor block, then:
* Increase the stroke: This is the key to "stroker" engines. You'll need a crankshaft with a longer stroke than the original. This usually requires a crankshaft specifically designed for the 383 stroker application, and possibly aftermarket connecting rods to accommodate the increased stroke.
* Possibly increase the bore: While a 383 can be achieved with just a longer stroke, increasing the bore size (making the cylinders wider) can also contribute to the increased displacement. This requires boring the cylinder block, potentially needing sleeves if you bore it significantly.
* Pistons: New pistons are required to match the increased stroke and bore.
* Other components: You may also need new piston rings, gaskets, and potentially other internal engine components depending on the extent of modifications.
In short, building a 383 stroker is a serious engine building project, requiring specialized tools, knowledge, and parts. It's not a simple bolt-on modification.