I don't think you'd be saving much money this way. A set of stock cast pistons for a 460 I would assume are not much less a set of KB's. Even if they are, the Ford pistons have a 1.04 pin, the KB stroker pistons are the stock 1.094, so you have to pay to get a set of bushings made up as well.

Really your best bet is the KB's, if funds are low, either run the stockers or put it on hold for a while till you can save a few bucks for them.

I can't see trying to do a stroker on a zero budget. Sure we all want 500-600hp but compromises have to be made...I'd love to do a 550hp 496 stroker for my 73 New Yorker, but it's just getting a stock rebuild 400 cause that's all I can afford right now. Being able to drive the car is better than sitting on it for another 3 or 4 years.