[urq] Fuel Pump Help

[AF]

So, there seem to be so many fuel pumps available for the UrQ. Some are
legitimate, some are not. Some have ring terminals, some have screw on
terminals. Can someone help me make sense of this. Bosch website lists two
pumps for the UrQ: 69429 and 69438. These must be part of a new numbering
system, because previously I thought they had longer part numbers, almost
like Audi/VW numbers. I think that the 69429 is really a 0 580 254 909,
which is listed by boschfuelpumps.com as a high performance fuel pump? This
is going in my V8 UrQ so I thought it might be important to match the
requirements of the ABZ engine (1997 A8) but I have no idea what the specs
are for the ABZ fuel pump, as it does not seem to be available aftermarket.
I don't want to buy a high capacity fuel pump if I don't really need it.
Should I stick with the 69429 pump that Bosch says is OEM or is there a
better way to go, Walbro, Python, or others? Thanks.

Andrew Finney
1985 UrQ V8