L92/LS3 heads can be installed on a LS2, but you have to use the L76/LS3 intake. There isn't any other intake on the market that will fit those heads. It is also the one complaint I have seen about those heads, the intake can't flow as much as the heads can. FAST has one coming, supposed to be soon, but I do not know when
http://www.fuelairspark.com/WhatsNew/ . I don't know if Weiand has one coming or not. Other options would be having a LS3 intake ported or a roots style supercharger.
David