It should do, but the other pump will also have to when the SU is working,
and you will have to make sure it doesn't give more than the couple of psi
that the SU does or it will flood the carbs without a regulator.
All-in-all it is a facility you are likely to need about once every fifteen
years, and with points type SU at least you can usually give it a thump and
get them going again, at least for a while.
PaulH.
----- Original Message -----
> I have an aftermarket fuel pump that I'd like to plumb in as a backup
(switch-driven) on my '71 BGT. I'd like to mount the aftermarket pump before
the stock pump, but am unsure that if (and when) the SU unit fails, it will
allow fuel to freely pass through.
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