I was reading through the older threads, and saw this one. I just completed putting fuel injection on my big block Corvette earlier this year. I am still in the tuning stages, but thought I would post some pics and information. I used a port manifold and fuel rails from Holley.
The computer is a Megasquirt, and I am using it for fuel and ignition. The ignition is handled by the Ford EDIS distributorless ignition.
The throttle body comes from
www.auto-nomics.com and is very reasonably priced. It was originally used for a fuel injection system that had the injectors under the throttle blades. However, Auto Nomics sells machined plugs that allows it to be used as a throttle body only. I also bought the wiring harness and fuel pump from Auto Nomics.
The system works better than I could have hoped for. So far, I have only had a few problems. 1. I think I screwed up when installing the new intake manifold gasket as I am getting smoke from the exhaust and fouled plugs. I will be replacing the manifold gaskets this coming week. 2. I bought a wideband O2 sensor from Innovate. It stopped working during the initial setup. Innovate fixed it under warranty no questions asked and it now works fine. 3. My old laptop with a serial port finally died, so I had to buy a USB-serial adaptor for the new computer. The adaptor works well, but it did cause Megasquirt to lockup once. There is a published fix for this.
As I said, I am still tuning (which is hampered by the oil leak) but I have run one track day in addition to my street driving with no fuel injection related problems. I am also using the extra output of Megasquirt to control my electric fans. I can turn the fans on and off at any temp, and I can also combine this with engine RPM (or any of a bunch of other factors) so the fans don't come on when the engine is cranking.
Ken