aftermarket head

i am looking for a set of assembled aftermarket heads because mine are worn out and cracked, best i’ve found is King Cylinder Heads, $325 per head, if anyone has already bought a good set for cheaper let me know where!

So there is plenty of information regarding the lack of options for headers to swap a GT40P headed 5.0 into late model (98+) rangers. However, does anyone know about header fitment with aftermarket heads like afr-185's or twisted wedge heads? It would appear that these heads have similar spark...