I'm also looking into starting a LS1 Shell Valley Cobra next winter, if everything goes as planned. Kind of a pricey engine, so I'm also looking into using a 6.0 chevy engine. I'd be interested in finding any info that you may have.
http://www.ls1swap.com/forums/
http://www.ls1tech.com/forums/
http://www.speartech.com/