Would take a special type of tinkeer to do the chip, and stuff to get this right, but I bought a 96-20 MY Vortec Monblade Throttle body. It's 75mm, and uses a 3 1/2" intake tube. The advantage is alot lower manifold velocity, and better / more even cylinder filling. An adapter will need to be made, and it might take some serious fangling machining, and chip wise to get right, but would have to be a head turner with the large tubing feeding it. I've just got a full plate with other stuff. I've got a 100 in it so for that and shipping it's yours.
It is brand new, other then finger prints on it.