Stroker crank in 360

I'm no professional but have been working on a stroker build myself. Look at it this way. If the stock crank stops the pistons at the top of the block deck, then where will the pistons stop if you add, oh say .50 inch to the stroke? My guess is, not before they hit the heads which might not be to good. Hope this helps and I hope my assumption is correct. good luck.