402 stroker

read somewhere a few weeks ago that if you buy a 402 stroker short block, that quite a few parts from the 5.3 could yield a great performance engine.. can someone elaborate on this thought in my head?

what all could i swap over? or maybe i read wrong...

well as far as i know and seen if your gonna take parts off a 5.3 the heads flow better than the 4.8 and ls1 heads but thats not talkin abt p&p , valve work and all that. not a lot of info but im in a rush so peace