The fuel pressure regulator will only allow as much fuel in as the injectors need (as long as it is calibrated/adjusted accordingly).

If the pump is putting out more than the regulator will let by, it just gets pumped back into the tank.

I put a fuel pump from a '95 Super Coupe (I believe it's a 190lph pump) into my '87 Ranger fuel tank to fuel my '87 5.0L engine.

They are incredibly interchangeable!

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1983 Ranger (with 5.0L Mustang powertrain)
1985 Mustang V6 (getting '94 SEFI upgrade)
1990 Escort (leaving the 1.8L alone...LOVE getting 38 MPG when the gas prices creep up!)
1991 Ranger (going to get rid of the 2.3 and put in a 4.0 (4.0 engine on stand right now!))
1996 Mustang Convertible (stock 3.8 right now but I have a '95 super coupe engine on a second stand right now!)
1997 Thunderbird 4.6L LX (going to put the body effects from the 95 SC to "sporty" 'er up a bit)