Dean,
I've have two motors with EFI (see below for some pictures) and I would definitely recommend that you consider the TWM setup. The EFI systems have the advantage of being able to provide a much better tune on any engine combination. A good system, properly installed, will also stay in tune for many years without any fiddling. Its more work and expense to get the EFI setup on the car initially but I think you'll be much happier with the performance and the lack of maintenance in the long run.
482 ci FE Ford from Keith Craft - TWM EFI w/FAST XFI ECU (650, hp 630 ft-lbs of Torque)
Also, EFI has the advantage of being able to make a fairly radical setup quite streetable. The block small block shown below is the first motor that I built with EFI and is a good example of this. This motor is street driven and runs on 93 octane pump gas. It starts and idles like a stocker and made 625 HP on the dyno.
383 Small Block Chevy - Blown and Injected (BigStuff Gen 3 ECU, 625 HP, 600 ft-lbs Torque)
Check out my gallery for some more pictures. For some additional information on these EFI setup, check out the following threads:
http://www.clubcobra.com/forums/show...312#post805312
Fuel Injection
EFI... that looks like Webers?
Let me know if you have questions on EFI and the TWM system. Best of luck with your project.
- Fred