Thanks for your response.
You were right and that's exactly what I did. I took the car to a certified tuner, and I saw what he did.
There were a few things that were not helping such as a BAD alternator and fuel maps.
The car has been tuned and it is drivable with lots of power, but I have to take it easy until the break-in has been completed.
I assumed that in a couple of weeks I will be taking it to a Dyno for final set up.
I will post the results as soon as available. Expected RWHP 425-475.
Streetport, T72 /81P, 750/1600 Injectors, FMIC, 3" Exhaust, 3" DUAL Pipes, BOSCH 044 in-line F/P.