I am getting one of the custom plenum intakes currently going on the group buy thread here:
http://forums.hybridz.org/topic/101620-l6-intake-manifold-group-buy/
Most people seem to be opting for the Q45 throttle plate, as I am doing as well, mostly for convenience of getting the base made. I assume if I don't like the performance of it, it's much easier to neck down an adapter plate for a smaller throttle body than to do the inverse. While looking around on other forums about how to deal with the issues of tip in on a large throttle bore, I cam across this eccentric wheel made for the drifter scene. I am not sure how the offsets work, but I was wondering if this might solve some of the tip in issues. If not, I'll just nip the problem in the bud and go for a 240sx throttle bore and lose some of my "street cred" bling out of my engine bay.
Here is the link to the wheel:
http://www.gktech.com/index.php/v2-s14a-s15-eccentric-throttle-wheel.html