I'd do a little measuring before swapping pumps.
You can easily add a new problem to the original
without knowing what is going on.
A fuel pressure gauge is relatively cheap.
Get one. ($20 for a whole kit at Harbor Freight)
You should see 50-55lb. The attachment is a
schrader valve at the front of the fuel rail on the
passenger side.
As a quick test you could listen to the car as
you turn the key on (but not start the car).
You should hear the two pumps kick on for 2seconds.
(the noise will come from the tank)
If you heard the noise (and have not bought the pressure gauge yet)
then you can see if there is pressure by momentarily pushing in
the schrader valve with a small screw driver. Be careful and
use a rag to capture any fuel that squirts out.
If you don't hear the pumps kick in for 2sec and/or you
get no fuel to come out the shrader valve (or preferably use
a pressure gauge) then it's time to measure the voltage back
at the wire harness going into the top of the tank. If you get 12v
for the first 2sec after key-on then it's time to pull the pumps.
Here is one link for a how to do this. There are others too.
http://www.zr1netregistry.com/Old_Proj/old_proj11.htm
PS
NEVER test the new pumps with 12v before installing in the tank
with gas in it!!
this destroys them or greatly reduces their life time.