Im working on it too, Im actually machining the whole assembly out of a block of aluminum on the CNC machine here at work complete with velocity stacks and all, right now all I have done is the throttle plates and the shaft for them, but I still need to o-ring the shaft to seal agains vacuum leaks. Its going to fit right on the lower manifold for now unless I come up with a different way.

You will definitely need to upgrade to #30 injectors and a warlbro pump, but that should be enough to get it running.

this setup wont really come alive till you bump up compression and add some nice cams to really make use of all the new found air coming in.

here is the writeup from the neon boards, its got some good info to get started, http://www.abdgraphics.com/iansite/ianthrottlebody2.htm

One of the main problems is room, as it is you will probably have to run a cowl type hood to give clearance for the air box/velocity stacks,etc..

But yes Jaded Silver from the ASOG board is much farther than me, he opted for the motorcycle TB's and at first was using ones with a dual throttle plate setup and was working on a way to open them partly to maintain low rpm torque and allow for stock like drivability.