Which Injectors Can I Use?

[SPower6]

I would like to use the biggest Injectors I can go with "without" any problems. Please share your experiences?
Here is my combo:
3.73 rear, Edlebrock Water Pump, Pulley's,Some type of Cam(??), Ported Edlebrock Intake, Edlebrock Aluminum Heads, Coated Long Tube Headers, Adjustable Clutch Cable, Flowmasters & X-Pipe, 70 MM TB & EGR Spacer.
Here are my concerns:
With my current combo, will the car run too rich and or poorly? Can adding an adj. fuel reg. cure all of these conditions? I was planning on getting a C&L 73 MM MAF and 30# Injectors?? Is the 73 MM MAF a drop in unit as far as installation (unbolt my stock MAF and bolt in a 73 MM MAF)? Will I have to add anything else other then the 73 MM MAF to run these 30# Injectors (electronics, etc.)? Are the 30# Injectors too big?
What do you all think? TIA.
Thanks,
Jeff
90 GT
89 TTA
87 GN