As far as reading what your FP is while under boost, you could hook up a hose to a gauge possibly & run it to your windshield & tape it, just to see if fp is rising above your boost pressure. If the fp is not @ least 1 psi above boost pressure you would definatley need a better/upgraded fuel system.
Initially, you said you were only going to run 6 or so psi, hence, the use of a stock fuel pump.
I am thinking since your car is an OG (original) 6 cyl car, it probably has only a 5/16" fuel line, which is too small & should be upgraded, from the fuel pick inside the tank all the way to the front. V-8 cars usually has 3/8" fuel line, if you are going to upgrade (& I would recommend) 3/8" would be the minimum size to upgrade to.
I know, more money, more money, but if you want to go fast & doing it safely, speed is going to cost you.
Now you are running 14 psi, you probably are running out of fuel @ this point.
This is the type of regulator I would use for a carb set-up. http://www.summitracing.com/parts/AEI-13204/ I do not like using a dead head type regulator. With that reg, it has a -8 fuel return that would need to return to your gas tank. Which keeps the fuel pump cool & less noisy.
When I was using the Paxton supercharger I ran the old Holley Blue race pump it had 18 psi. I think the spring was streched or shimmed, I got it from a friend used like this pump here. http://www.summitracing.com/parts/HLY-12-802-1/?rtype=10 Stock they put out 14 psi, but like I said, I think the spring was shimmed or streched to increase the pressure to 18 psi. It was pretty loud. I just ran the old standard Holley FPR, dead head type,(drilled/tapped & fitting installed for boost ref line)(picture next to the pump) never really like that combo myself, but it worked & I did not have much money for a nicer pump & regulator.
Or, adjust pump ,bolt & nut adjustment where the spring is. Different color pump cam or? Just saying there are different ways to increase squirter output.
