Thermostat housing

[XLexusTech]

Anyone have the GM part number for the LS1 thermostat housing needed to use a front runner? I just got my front runner and saw that it requires an older (I have the newer GMPp ls3 480) LS1 thermostat housing?

[Vince@Meanstreets]

Early housing w/t-stat is AC delco, 15-10412 or GM # 12571261