Port injection is what you want but TBI is easy. Holley HP/Dominator or FAST XFI is the best way to go. You can run multiple stages of nitrous, traction control, and do many other things with these units. Big Stuff 3 is another option for computer control. Many of the top drag racers use Big Stuff 3.
If you were to do the FAST TBI I would spend a hair more than EZ EFI 2.0 and get the Sportsman XFI. FAST's Sportsman XFI uses the same throttle body but applies the better XFI software. Don't worry, Sportsman XFI can "auto tune" as well but in the end just think of as an electronically controlled carb.
Here's a link to my engine with the full FAST XFI 2.0 system if you want to check it out. I'll edit my WIW post so you can see how much it costs to convert your Pontiac engine to sequential port injection like mine.
http://forums.maxperformanceinc.com/...d.php?t=785073