408 stroker engine build

I have a 68, 340 block that will be stroked. The best source for stroking small blocks arew contained in a book by a Chrysler engineer. The things that instantly come to mind are the limitations of the small block HP at approximately 420HP before longevity is comprimised. Richard Ehrnberg of Mopar Action also expresses this concern and a friend gernaded a 500 HP 340, so your application appears approtiate. Eill try to find the book title and post here.