[mwebb]

remember
the thing about the clear plastic on the return line ?
if there are no bubbles in that , your fuel flow and pressure is sufficient for the demand / the need of your system .

to confirm
make sure your 02 sensor is cycling from 150mv to 850mv and back
if it is
your system is at stoich
14.7 to 1

do not
do not
do not
screw around with fuel pressure , measure it if you feel the need .

if these two simple tests are "good" then fuel flow and fuel pressure are both good.
fuel flow is as important if not more important than fuel pressure

test - do not guess .
==============================
you may not use spark plug color to determine fuel mixture .
it is not accurate or valid - stop suggesting it as someone may see that and believe it

you may use spark waveforms to see lean or rich condition - i can show you how .
but
you will need a way to view your spark waveforms - you need a scope
a high res scope , absent that or a 4 gas or a 5 gas
without them
you can not tell if your system is rich or lean

i have already showed you how to use an 02 sensor waveform to see if the system is rich or lean or cycling and at stoich
but
- no one seems to have learned that simple lesson -

test - do not guess