Fuel delivery in drag car requirements?

What do you guys like for fuel delivery? My car was originally set up for the c-motor and it has 1/2 inch line front to back. During my runs the fuel pressure does not drop one iota, does this mean you have a adequate pump or can you still be short gph. I did check mine at free flow through regulators and it flows about 1.2 gallons a minute. Doesn't nose over at all just checking a few things out?Have had some guys here they figure pump is not big enough. I think it's supposed to flow 110gph?