Unless you plan on using 8x 525cc injectors(flat out, which would be close to the pumps max) then it will do just fine

Walbro = 255 litres per hour

525cc x4 injectors= 2100cc or 2.1ltrs per min x 60mins = 126 ltrs per hour.
525cc x8 injectors= 4200cc or 4.2ltrs per min x 60mins = 252 ltrs per hour.