Fuel pump Bosch044 question

[bonesxu1]

My Ute has 3 fuel pumps, standard in the tank and two Bosch 044's. One will kick in if the other can't cope and it needs more fuel. I think either one or both aren't working and was wondering about a Walbro equivalent for a replacement. The Walbro site says that their equivalent is good for 500hp, so I am presuming that that would be fine for my 670hp since the second one will kick in if it needs to? Any other info that can help me out would be gratefully appreciated.

[bonesxu1]

Looks like my in pump tank is goosed too, the filter is looking pretty nasty. Any idea what in tank bucket pumps will fit a VY SS Ute?