I have my electric boost pump under the LH seat. Not a Dukes pump but an
Airflow performance pump.  No header tank.  Left and right  tank lines go
direct to an Andair fuel valve in the centre console just below and aft of
the radio stack. Left/right/off positions.  From there the line runs to the
Airflow screen filter and then to the pump, then through the fuel transducer
just forward of the spar on the LH side of the nose gear tunnel and along
the side of the tunnel through the firewall and into the gascolator.  From
there direct to the engine driven pump.

I have 80 hours on the a/c (LNC2) and no/no problems at all with fuel with
the engine hot or cold.  It starts like a dream hot or cold and there is
always adequate fuel pressure at start up.  Having said that hot start is
with mixture in ICO, throttle fully open and boost pump off.  When engine
starts retard throttle and advance mixture, so I really do not know what
happens to the fuel pressure until the engine pump starts to pump.  Cold
starts needing fuel prime, the pressure is always there as soon as the boost
pump switch is ON.

It is plain to see that the pump will not overheat under the seat and at
least if you ever had a fuel leak you would know about it much earlier than
if it was spraying raw fuel over the hot components of the engine.  I never
even thought of putting the pump anywhere else and due to its location it is
always primed.  I feel confident enough with my plumbing all in solid 3/8"
Al pipe with no plastic anywhere.

Hope this helps

Ian Crowe

 C-FKRO