Suprisingly, compiling the stock 10.2 kernel (2.6.18.2-34) on 10.3 worked! So looks like the snd-powermac driver got messed up somewhere along the way to 10.3's 2.6.22.5-31 version.

Thanks for the help, but I'm going to stick with what I have going at the moment. Just tired of messing with this =)