yeh i'd like to give one of these a go on my rb25 too.
but what manifold are you going to be using? you won't get it on the stock one without a spacer and its gonna be restricted up top....
a 6 boost would be nice but not at $1400!!! then at the other end you got the nasty china junk for $200 that won't last a week, is there any alternative for highmount manifolds around the $800 range?