340 X Heads 2531894

Pair of 340 X heads #2531894 dated 08 18 9 08 04 9,came from a running engine and are good to go.Springs are said to be good to 480 lift. Looking to trade for a good 489 or 742 suregrip with 391s and a small yoke.Located in central WI near Waupaca.May consider meeting halfway if your within WI