Advice on stroker kits

When building my 400 block based 500, I specified 440 length rods. That made the pistons really short and the oil ring was partially in the pin boss. I would go with a shorter rod, or a shorter stroke, to gain more piston skirt. My engine has noticeable piston slap. One advantage of the short piston is that it only weighs about 500 grams, so it is a quick revving engine.