A pair of quick duty cycle calculations
to see if that hints at anything on the unknown
V10 injector capacity.

First the 1994-1995 Magnum 5.9L V8
since Larry Shepard has written in MP New magazine that it is a known 24.5 lbs/hr

PerformanceTrends Engine Analyser 3.2B computer program estimates that at an air to fuel ratio of 12.5 the wide open throttle fuel flow at 4000 rpm is 130 lbs per hour for 8 injectors on a Magnum 5.9L V8 with 1995 specs.
Since the factory stock setting of air to fuel is also known to be actually much richer at 10.5,
we increase the fuel flow to (12.5/10.5 times 130) = 154.8
154.8 divided by 8 injectors = 19.4 lbs per hour

19.4 divided by 24.5 = 79% Duty Cycle

Since the typical recommendation is to stay below 80% duty cycle on sequential fuel injection this sounds believable.

Now for the V10

PerformanceTrends Engine Analyser 3.2B estimates 171 lbs per hour flow at wide open throttle at 4000 rpm using an air to fuel ratio of 12.5
Increase the 171 lbs/hr by (12.5/10.5) = 203.6
203.6 divided by 10 injectors = 20.36 each

20.36 divided by 0.79 percent duty cycle = 25.8

So a guess would be that the
1994 V10 injector PN 53040003
should be (25.8/24.5) larger

or about 5% higher capacity

The 1995 Field Service Manual says that both engines are getting the same 35 to 45 psi fuel pressure from a 2 liter per minute fuel pump assembly. Converting 2L/minute to pounds per hour is approximately
(2/3.8 times 60 min/hr times 6.5 lbs/gal)
= 205 pounds per hour of gasoline
so even on the V10 truck there is enough fuel available to the injectors