You build some NICE cars, I have seen a couple in person at some shows., I think the new gen of TBI's are the hot setup, short of MPI which you can adjust each cyl's fuel and spark, I think the powerjection and ez-efi will make as much hp or a little more as the best tuned carbs and give better drivabilty and throttle response like mpi. Pete, are you running a single or dual plane intake? are you running a carb to compare it to?
In my case I have three intakes for my 408, I had a indy car builder hand port a torker 2 for me, I know its a crappy intake but hood clearance is good and it looks like it will flow as good as a vic jr, on the car is a PP typhoon (stealth clone) which I port matched and slightly ported myself, then I have an rpm which I was thinking of haviing ported and flow balanced.
I think the powerjection 3 is cool but the PJ1 had ignition control and 750 or 1200 cfm......I guess they are trying to make it more universal. Get that thing installed and let us know how you like it cause I am waiting to buy one after I see what you think.