http://www.mastmotorsports.com/2010/pro ... lds&id=374
Max effort all motor/nitrous intake. Considered by most the best drag racing manifold available. http://m.summitracing.com/search/produc ... -manifolds
Fast lsxr and lsxrt (which would be my choice with enough hood clearance and if money was no object)
There's also the GMPP single plane for l92 heads but its pretty shitty in the power department.