TBI injector upgrade

I have done alot of porting and have raised the compression on my 89 2.5 na Daytona.
I need to get the car fine tuned for fuel.The stock injector is good,but I want an adjusable fuel pressure regulator and a btter fuel injector to deliver the needed fuel for all this extra air coming in.
Anyone have a suggestion besides the MPI conversion?
Where would I get a larger injector for my tbi,and where to find an adjustable fuel pressure regulator?
Thank you,Mike T

Link to my fiancee's page,it shows what I have had done to the car.More updated pics with the strut bar bracer installed coming soon.

http://www.sounddomain.com/id/perfectblueangel