Edelbrock head alternatives?

Not dishing on the RHS heads at all. my 340/x head combo with the 2800 stall and 4.56 gears ran a best of 14.10 at 4400 feet With more stroke,(408) more compression, same stall, same car weight. My RHS heads, that were bought from Brian a IMM, lowered my ET down to a high 11.90 Sec. ET.