33outlaw - I saw those orange intakes and asked if he would sell one but he never got back to me.

Hogans intakes.. http://www.hogansracingmanifolds.com/index.aspx

Whats the advantages of single blade and multi blade throttle bodies? Is one better than another for certain applications?

those were nice, dont know who built them, I think they had 800 or 850 on the top plenum

Opening area vs throttle position.

A huge single throttle bladed throttle body can act like an on/off switch on some engine applications.
Not only can it make some app's tough to drive, but on same app's can make computer progamming tougher to accomplish.

Some people and some applications like to have more throttle control (ie: slower blade to throttle body opening area) ....thus the 4bbl throttle bodies with progressive rear throttle blades. Obviously, drive by wire can take a lot of the on/off action out also.

Accufab makes some really nice 4150 and 4500 style throttle bodies that will look nice on that motor! I would not go with the 90 degree set-up, but I do have a Accufab 90 and Wilson elbow for sale!

http://performancedesign.com/product/carbon-tr

if they can custom design one for your app and they offer KCS throttle body's to match up with their intakes

and for the LS7 - they offer a very cool piece as well.

http://performancedesign.com/product/xr

As mentioned above, Edelbrock makes a very capable tunnel ram(Pro Flo Xt) intake that utilizes a LS throttle body. Would easily handle your goals HP wise. This is one I just picked up.

Borgie - do you have a link to it. I couldn't find it on their website. Also does it come in 10.2 deck height?

that is a nice looking intake.for some reason i thought you had oval port heads