#3919840 big block Rec.port heads
A buddy trying to sell me a set of complete 840 heads, the casting no. is on bottom of the heads but they have been hot rodded a little, some one ground out casting #s and date code on inside and I think intake port is bigger exhaust looks stock , Im looking for a set to build a Yenko clone motor. One of the valve retainer caps cracked looks like alum. I thought those were steel. Dont know if they have been Milled. whats a set of heads like these with no date code and that have been messed with Run?