I just came across this while killing time figured i'd post it


http://www.4x4wire.com/tech/60degreeV6/index.htm


Turbo City, Holley or GM 4.3 TBI


TBI taken from a GM 4.3L V6, which the 2.8's ECU can deal with just fine
Short of a turbo -- or the twin-turbo setup that an acquaintance used on his 2.8L-equipped Datsun 510 -- the most notable gain to be had is from the addition of a high-flow throttle body. Good for approximately 20 hp, this simple 1-2 hour install goes a long way toward making your daily driver enjoyable, or at least less embarrassing. Mixing more air and fuel, and delivering them through larger throttle bores, the Holley 3210 provides an affordable option for many.

Turbo City reportedly makes a better product, and sells it at a better price. Their Hi-Flow TBI features some slick touches like air flow enhancement via shaved throttle body shafts. If not for the next option, this would be one to look at seriously. More affordable still, the TBI from a 4.3L GM V6 bolts right up. These throttle bodies are less than a hundred dollars at a good salvage yard, and the 2.8's ECU will handle the increased flow just fine. Turbo City's throttle body is actually built from the foundation of this GM model; they shave, tune, and polish it.

It only takes a few hours to install any of these throttle bodies, so the return on your effort is very high. These three throttle bodies are direct bolt-ups and provide excellent horsepower gains. In most cases, fuel economy will remain about the same if fuel pressure is well-regulated. With this sensitivity to fuel pressure, some have found it useful to install an adjustable fuel pressure regulator and even a pressure gauge in-line. The Holley, however, has a built-in adjustment screw.