When you build a 500hp engine you are almost guaranteed to need new rods and pistons and having the assembly balanced isn't even a question.
In that scenario the only money you're truly saving is the cost of a crankshaft itself. (lol this is something of a sore point for me coz I didn't stroke my 318 but it ended up costing me as much as if I would have)
Last time I checked the cost of a stroker crank is about $650-700
What can you get in the way of top end upgrades for $650-700 that is going to net you more gain than an extra 50 cubes would do?